diff --git a/build.gradle b/build.gradle
index e83cba6046..8b4c1f00e4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,8 +1,10 @@
+import org.gradle.util.GradleVersion
+
 // define all versioned plugins here and apply in subprojects as necessary without version
 plugins {
   id 'com.github.sherter.google-java-format' version '0.9' apply false
   id 'net.ltgt.errorprone' version '3.1.0' apply false
-  id 'net.researchgate.release' version '2.8.1' apply false
+  id 'net.researchgate.release' version '3.1.0' apply false
   id 'com.gradle.plugin-publish' version '1.2.0' apply false
   id 'io.freefair.maven-plugin' version '5.3.3.3' apply false
 
@@ -79,18 +81,23 @@ subprojects {
   apply plugin: 'net.ltgt.errorprone'
   apply plugin: 'jacoco'
 
-  // Guava update breaks unit tests. Workaround mentioned in https://github.com/google/guava/issues/6612#issuecomment-1614992368.
-  sourceSets.all {
-    configurations.getByName(runtimeClasspathConfigurationName) {
-      attributes.attribute(Attribute.of("org.gradle.jvm.environment", String), "standard-jvm")
-    }
-    configurations.getByName(compileClasspathConfigurationName) {
-      attributes.attribute(Attribute.of("org.gradle.jvm.environment", String), "standard-jvm")
+  // Guava update breaks unit tests in Gradle 6.x. Workaround mentioned in https://github.com/google/guava/issues/6612#issuecomment-1614992368.
+  // Only needed for Gradle < 7, as Gradle 7+ handles this automatically
+  if (GradleVersion.current() < GradleVersion.version('7.0')) {
+    sourceSets.all {
+      configurations.getByName(runtimeClasspathConfigurationName) {
+        attributes.attribute(Attribute.of("org.gradle.jvm.environment", String), "standard-jvm")
+      }
+      configurations.getByName(compileClasspathConfigurationName) {
+        attributes.attribute(Attribute.of("org.gradle.jvm.environment", String), "standard-jvm")
+      }
     }
   }
 
-  sourceCompatibility = JavaVersion.VERSION_1_8
-  targetCompatibility = JavaVersion.VERSION_1_8
+  java {
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+  }
   compileJava.options.encoding = 'UTF-8'
   compileJava.options.compilerArgs += [ '-Xlint:deprecation' ]
   compileTestJava.options.compilerArgs += [ '-Xlint:deprecation' ]
@@ -177,7 +184,7 @@ subprojects {
 
   /* TEST CONFIG */
   tasks.withType(Test).configureEach {
-    reports.html.outputLocation = file("${reporting.baseDir}/${name}")
+    reports.html.outputLocation = file("${project.buildDir}/reports/${name}")
   }
 
   test {
@@ -215,8 +222,7 @@ subprojects {
 
   configurations {
     integrationTestImplementation.extendsFrom testImplementation
-    integrationTestImplementation.setCanBeResolved(true)
-    integrationTestRuntime.extendsFrom testRuntime
+    integrationTestRuntimeOnly.extendsFrom testRuntimeOnly
   }
 
   // Integration tests must be run explicitly
@@ -397,7 +403,12 @@ subprojects {
     sourceProjects += dependencyProject
     // if we find any project dependencies that were brought in transitively, go remove them
     project.configurations.implementation.dependencies.removeAll { d ->
-      return d instanceof ProjectDependency && sourceProjects.contains(d.dependencyProject)
+      if (d instanceof ProjectDependency) {
+        // Gradle 6.9.2 uses dependencyProject, Gradle 9+ uses path
+        def depProject = d.hasProperty('dependencyProject') ? d.dependencyProject : project.project(d.path)
+        return sourceProjects.contains(depProject)
+      }
+      return false
     }
     // adds dependencyProject's classes to jar (fat jar-esque)
     jar {
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
index 87b738cbd0..8bdaf60c75 100644
Binary files a/gradle/wrapper/gradle-wrapper.jar and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index ec991f9aa1..2dcec856bd 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,5 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-6.9.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-9.0-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
index af6708ff22..ef07e0162b 100755
--- a/gradlew
+++ b/gradlew
@@ -1,78 +1,129 @@
-#!/usr/bin/env sh
+#!/bin/sh
+
+#
+# Copyright © 2015 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
 
 ##############################################################################
-##
-##  Gradle start up script for UN*X
-##
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
 ##############################################################################
 
 # Attempt to set APP_HOME
+
 # Resolve links: $0 may be a link
-PRG="$0"
-# Need this for relative symlinks.
-while [ -h "$PRG" ] ; do
-    ls=`ls -ld "$PRG"`
-    link=`expr "$ls" : '.*-> \(.*\)$'`
-    if expr "$link" : '/.*' > /dev/null; then
-        PRG="$link"
-    else
-        PRG=`dirname "$PRG"`"/$link"
-    fi
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
 done
-SAVED="`pwd`"
-cd "`dirname \"$PRG\"`/" >/dev/null
-APP_HOME="`pwd -P`"
-cd "$SAVED" >/dev/null
-
-APP_NAME="Gradle"
-APP_BASE_NAME=`basename "$0"`
 
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-DEFAULT_JVM_OPTS='"-Xmx64m"'
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
-MAX_FD="maximum"
+MAX_FD=maximum
 
 warn () {
     echo "$*"
-}
+} >&2
 
 die () {
     echo
     echo "$*"
     echo
     exit 1
-}
+} >&2
 
 # OS specific support (must be 'true' or 'false').
 cygwin=false
 msys=false
 darwin=false
 nonstop=false
-case "`uname`" in
-  CYGWIN* )
-    cygwin=true
-    ;;
-  Darwin* )
-    darwin=true
-    ;;
-  MINGW* )
-    msys=true
-    ;;
-  NONSTOP* )
-    nonstop=true
-    ;;
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
 esac
 
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+CLASSPATH="\\\"\\\""
+
 
 # Determine the Java command to use to start the JVM.
 if [ -n "$JAVA_HOME" ] ; then
     if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
         # IBM's JDK on AIX uses strange locations for the executables
-        JAVACMD="$JAVA_HOME/jre/sh/java"
+        JAVACMD=$JAVA_HOME/jre/sh/java
     else
-        JAVACMD="$JAVA_HOME/bin/java"
+        JAVACMD=$JAVA_HOME/bin/java
     fi
     if [ ! -x "$JAVACMD" ] ; then
         die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
@@ -81,92 +132,120 @@ Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
     fi
 else
-    JAVACMD="java"
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
+    fi
 fi
 
 # Increase the maximum file descriptors if we can.
-if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
-    MAX_FD_LIMIT=`ulimit -H -n`
-    if [ $? -eq 0 ] ; then
-        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
-            MAX_FD="$MAX_FD_LIMIT"
-        fi
-        ulimit -n $MAX_FD
-        if [ $? -ne 0 ] ; then
-            warn "Could not set maximum file descriptor limit: $MAX_FD"
-        fi
-    else
-        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
-    fi
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
 fi
 
-# For Darwin, add options to specify how the application appears in the dock
-if $darwin; then
-    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
-fi
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
 
-# For Cygwin, switch paths to Windows format before running java
-if $cygwin ; then
-    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
-    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
-    JAVACMD=`cygpath --unix "$JAVACMD"`
-
-    # We build the pattern for arguments to be converted via cygpath
-    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
-    SEP=""
-    for dir in $ROOTDIRSRAW ; do
-        ROOTDIRS="$ROOTDIRS$SEP$dir"
-        SEP="|"
-    done
-    OURCYGPATTERN="(^($ROOTDIRS))"
-    # Add a user-defined pattern to the cygpath arguments
-    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
-        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
-    fi
     # Now convert the arguments - kludge to limit ourselves to /bin/sh
-    i=0
-    for arg in "$@" ; do
-        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
-        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
-
-        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
-            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
-        else
-            eval `echo args$i`="\"$arg\""
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
         fi
-        i=$((i+1))
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
     done
-    case $i in
-        (0) set -- ;;
-        (1) set -- "$args0" ;;
-        (2) set -- "$args0" "$args1" ;;
-        (3) set -- "$args0" "$args1" "$args2" ;;
-        (4) set -- "$args0" "$args1" "$args2" "$args3" ;;
-        (5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
-        (6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
-        (7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
-        (8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
-        (9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
-    esac
 fi
 
-# Escape application args
-save () {
-    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
-    echo " "
-}
-APP_ARGS=$(save "$@")
-
-# Collect all arguments for the java command, following the shell quoting and substitution rules
-eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
 
-# by default we should be in the correct project dir, but when run from Finder on Mac, the cwd is wrong
-if [ "$(uname)" = "Darwin" ] && [ "$HOME" = "$PWD" ]; then
-  cd "$(dirname "$0")"
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
 fi
 
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
 exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
index 6d57edc706..db3a6ac207 100644
--- a/gradlew.bat
+++ b/gradlew.bat
@@ -1,4 +1,22 @@
-@if "%DEBUG%" == "" @echo off
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
 @rem
 @rem  Gradle startup script for Windows
@@ -9,25 +27,29 @@
 if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
 @rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-set DEFAULT_JVM_OPTS="-Xmx64m"
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
 
 @rem Find java.exe
 if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto init
+if %ERRORLEVEL% equ 0 goto execute
 
-echo.
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -35,48 +57,36 @@ goto fail
 set JAVA_HOME=%JAVA_HOME:"=%
 set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
-if exist "%JAVA_EXE%" goto init
+if exist "%JAVA_EXE%" goto execute
 
-echo.
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
-echo.
-echo Please set the JAVA_HOME variable in your environment to match the
-echo location of your Java installation.
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
 
 goto fail
 
-:init
-@rem Get command-line arguments, handling Windows variants
-
-if not "%OS%" == "Windows_NT" goto win9xME_args
-
-:win9xME_args
-@rem Slurp the command line arguments.
-set CMD_LINE_ARGS=
-set _SKIP=2
-
-:win9xME_args_slurp
-if "x%~1" == "x" goto execute
-
-set CMD_LINE_ARGS=%*
-
 :execute
 @rem Setup the command line
 
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+set CLASSPATH=
+
 
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
 
 :end
 @rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
+if %ERRORLEVEL% equ 0 goto mainEnd
 
 :fail
 rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
 rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
-exit /b 1
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
 
 :mainEnd
 if "%OS%"=="Windows_NT" endlocal
diff --git a/jib-build-plan/build.gradle b/jib-build-plan/build.gradle
index 6adb928055..48a85c5552 100644
--- a/jib-build-plan/build.gradle
+++ b/jib-build-plan/build.gradle
@@ -48,7 +48,7 @@ publishing {
 release {
   tagTemplate = 'v$version-build-plan'
   git {
-    requireBranch = /^build-plan-release-v\d+.*$/  //regex
+    requireBranch.set(/^build-plan-release-v\d+.*$/)
   }
 }
 /* RELEASE */
diff --git a/jib-cli/build.gradle b/jib-cli/build.gradle
index ee5c6ba179..eacff266f2 100644
--- a/jib-cli/build.gradle
+++ b/jib-cli/build.gradle
@@ -61,7 +61,7 @@ release {
     'com.google.cloud.tools:jib-plugins-common',
   ]
   git {
-    requireBranch = /^cli-release-v\d+.*$/  //regex
+    requireBranch.set(/^cli-release-v\d+.*$/)
   }
 }
 
diff --git a/jib-core/build.gradle b/jib-core/build.gradle
index f31340e269..b9b46b3728 100644
--- a/jib-core/build.gradle
+++ b/jib-core/build.gradle
@@ -71,7 +71,7 @@ publishing {
 release {
   tagTemplate = 'v$version-core'
   git {
-    requireBranch = /^core-release-v\d+.*$/  //regex
+    requireBranch.set(/^core-release-v\d+.*$/)
   }
 }
 /* RELEASE */
diff --git a/jib-gradle-plugin-extension-api/build.gradle b/jib-gradle-plugin-extension-api/build.gradle
index 1478f30127..ca9c7f2dff 100644
--- a/jib-gradle-plugin-extension-api/build.gradle
+++ b/jib-gradle-plugin-extension-api/build.gradle
@@ -44,7 +44,7 @@ publishing {
 release {
   tagTemplate = 'v$version-gradle-extension'
   git {
-    requireBranch = /^gradle-extension-release-v\d+.*$/  //regex
+    requireBranch.set(/^gradle-extension-release-v\d+.*$/)
   }
 }
 /* RELEASE */
diff --git a/jib-gradle-plugin/build.gradle b/jib-gradle-plugin/build.gradle
index 46f416ab1e..671e88ca63 100644
--- a/jib-gradle-plugin/build.gradle
+++ b/jib-gradle-plugin/build.gradle
@@ -45,29 +45,25 @@ dependencies {
   integrationTestImplementation dependencyStrings.JBCRYPT
 
   // only for testing a concrete Spring Boot example in a test (not for test infrastructure)
-  testImplementation 'org.springframework.boot:spring-boot-gradle-plugin:2.2.11.RELEASE'
+  testImplementation 'org.springframework.boot:spring-boot-gradle-plugin:2.7.18'
 }
 
 /* RELEASE */
 // Prepare release
 release {
-  tagTemplate = 'v$version-gradle'
+  tagTemplate = 'v$version-gradle-plugin'
   ignoredSnapshotDependencies = [
     'com.google.cloud.tools:jib-core',
     'com.google.cloud.tools:jib-plugins-common',
   ]
   git {
-    requireBranch = /^gradle-release-v\d+.*$/  //regex
+    requireBranch.set(/^gradle-release-v\d+.*$/)
   }
 }
 // Gradle Plugin Portal releases
-pluginBundle {
+gradlePlugin {
   website = 'https://github.com/GoogleContainerTools/jib/'
   vcsUrl = 'https://github.com/GoogleContainerTools/jib/'
-  tags = ['google', 'java', 'containers', 'docker', 'kubernetes', 'microservices']
-}
-
-gradlePlugin {
   testSourceSets sourceSets.integrationTest, sourceSets.test
   plugins {
     jibPlugin {
@@ -75,6 +71,7 @@ gradlePlugin {
       displayName = 'Jib'
       description = 'Containerize your Java application'
       implementationClass = 'com.google.cloud.tools.jib.gradle.JibPlugin'
+      tags = ['google', 'java', 'containers', 'docker', 'kubernetes', 'microservices']
     }
   }
 }
diff --git a/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/GradleProjectProperties.java b/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/GradleProjectProperties.java
index 6a1978fe19..60339aa7c5 100644
--- a/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/GradleProjectProperties.java
+++ b/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/GradleProjectProperties.java
@@ -224,7 +224,8 @@ public JibContainerBuilder createJibContainerBuilder(
       SourceSet mainSourceSet = getMainSourceSet();
       FileCollection classesOutputDirectories =
           mainSourceSet.getOutput().getClassesDirs().filter(File::exists);
-      Path resourcesOutputDirectory = mainSourceSet.getOutput().getResourcesDir().toPath();
+      File resourcesDir = mainSourceSet.getOutput().getResourcesDir();
+      Path resourcesOutputDirectory = resourcesDir != null ? resourcesDir.toPath() : null;
       FileCollection allFiles =
           project.getConfigurations().getByName(configurationName).filter(File::exists);
 
@@ -232,7 +233,7 @@ public JibContainerBuilder createJibContainerBuilder(
           allFiles
               .minus(classesOutputDirectories)
               .minus(projectDependencies)
-              .filter(file -> !file.toPath().equals(resourcesOutputDirectory));
+              .filter(file -> resourcesOutputDirectory == null || !file.toPath().equals(resourcesOutputDirectory));
 
       FileCollection snapshotDependencies =
           nonProjectDependencies.filter(file -> file.getName().contains("SNAPSHOT"));
@@ -254,7 +255,7 @@ public JibContainerBuilder createJibContainerBuilder(
       switch (containerizingMode) {
         case EXPLODED:
           // Adds resource files
-          if (Files.exists(resourcesOutputDirectory)) {
+          if (resourcesOutputDirectory != null && Files.exists(resourcesOutputDirectory)) {
             javaContainerBuilder.addResources(resourcesOutputDirectory);
           }
 
@@ -270,9 +271,11 @@ public JibContainerBuilder createJibContainerBuilder(
         case PACKAGED:
           // Add a JAR
           Jar jarTask = (Jar) project.getTasks().findByName("jar");
-          Path jarPath = jarTask.getArchiveFile().get().getAsFile().toPath();
-          log(LogEvent.debug("Using JAR: " + jarPath));
-          javaContainerBuilder.addToClasspath(jarPath);
+          if (jarTask != null) {
+            Path jarPath = jarTask.getArchiveFile().get().getAsFile().toPath();
+            log(LogEvent.debug("Using JAR: " + jarPath));
+            javaContainerBuilder.addToClasspath(jarPath);
+          }
           break;
 
         default:
@@ -384,7 +387,14 @@ public String getMainClassFromJarPlugin() {
 
   @Override
   public Path getDefaultCacheDirectory() {
-    return project.getBuildDir().toPath().resolve(CACHE_DIRECTORY_NAME);
+    return getBuildDirPath(project).resolve(CACHE_DIRECTORY_NAME);
+  }
+
+  /**
+   * Gets the build directory.
+   */
+  private static Path getBuildDirPath(Project project) {
+    return project.getLayout().getBuildDirectory().get().getAsFile().toPath();
   }
 
   @Override
diff --git a/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/OutputPathsParameters.java b/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/OutputPathsParameters.java
index 46b4b6e608..33ecce93b7 100644
--- a/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/OutputPathsParameters.java
+++ b/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/OutputPathsParameters.java
@@ -37,10 +37,30 @@ public class OutputPathsParameters {
   @Inject
   public OutputPathsParameters(Project project) {
     this.project = project;
-    digest = project.getBuildDir().toPath().resolve("jib-image.digest");
-    imageId = project.getBuildDir().toPath().resolve("jib-image.id");
-    imageJson = project.getBuildDir().toPath().resolve("jib-image.json");
-    tar = project.getBuildDir().toPath().resolve("jib-image.tar");
+    Path buildDir = getBuildDirPath(project);
+    digest = buildDir.resolve("jib-image.digest");
+    imageId = buildDir.resolve("jib-image.id");
+    imageJson = buildDir.resolve("jib-image.json");
+    tar = buildDir.resolve("jib-image.tar");
+  }
+
+  /**
+   * Gets the build directory in a Gradle version-compatible way.
+   * Uses layout.buildDirectory for Gradle 7+ and getBuildDir() for Gradle 6.x.
+   */
+  @SuppressWarnings("deprecation")
+  private static Path getBuildDirPath(Project project) {
+    try {
+      // Try Gradle 7+ API: project.getLayout().getBuildDirectory().get().getAsFile()
+      Object layout = project.getClass().getMethod("getLayout").invoke(project);
+      Object buildDirectory = layout.getClass().getMethod("getBuildDirectory").invoke(layout);
+      Object provider = buildDirectory.getClass().getMethod("get").invoke(buildDirectory);
+      java.io.File file = (java.io.File) provider.getClass().getMethod("getAsFile").invoke(provider);
+      return file.toPath();
+    } catch (Exception e) {
+      // Fall back to Gradle 6.x API
+      return project.getBuildDir().toPath();
+    }
   }
 
   @Input
diff --git a/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/TaskCommon.java b/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/TaskCommon.java
index ca7fc761eb..4d8b23a968 100644
--- a/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/TaskCommon.java
+++ b/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/TaskCommon.java
@@ -92,7 +92,7 @@ static void finishUpdateChecker(
   @Nullable
   static TaskProvider<Task> getWarTaskProvider(Project project) {
     if (project.getPlugins().hasPlugin(WarPlugin.class)) {
-      return project.getTasks().named(WarPlugin.WAR_TASK_NAME);
+      return project.getTasks().named("war");
     }
     return null;
   }
diff --git a/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/skaffold/FilesTaskV2.java b/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/skaffold/FilesTaskV2.java
index e5e482d355..a5fdf923f7 100644
--- a/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/skaffold/FilesTaskV2.java
+++ b/jib-gradle-plugin/src/main/java/com/google/cloud/tools/jib/gradle/skaffold/FilesTaskV2.java
@@ -51,12 +51,27 @@
  */
 public class FilesTaskV2 extends DefaultTask {
 
-  private static final GradleVersion GRADLE_9 = GradleVersion.version("9.0");
-
   private final SkaffoldFilesOutput skaffoldFilesOutput = new SkaffoldFilesOutput();
 
   @Nullable private JibExtension jibExtension;
 
+  /**
+   * Gets the dependency project from a ProjectDependency in a Gradle version-compatible way.
+   *
+   * @param projectDependency the project dependency
+   * @return the dependency project
+   */
+  private Project getDependencyProject(ProjectDependency projectDependency) {
+    // Gradle 6.9.2 uses getDependencyProject(), Gradle 9+ uses getPath()
+    try {
+      // Try Gradle 6.9.2 API first
+      return (Project) projectDependency.getClass().getMethod("getDependencyProject").invoke(projectDependency);
+    } catch (Exception e) {
+      // Fall back to Gradle 9+ API
+      return getProject().project(projectDependency.getPath());
+    }
+  }
+
   public FilesTaskV2 setJibExtension(JibExtension jibExtension) {
     this.jibExtension = jibExtension;
     return this;
@@ -91,14 +106,14 @@ public void listFiles() throws IOException {
 
     Set<File> projectDependencyJars = new HashSet<>();
     for (ProjectDependency projectDependency : projectDependencies) {
-      addProjectFiles(projectDependency.getDependencyProject());
+      addProjectFiles(getDependencyProject(projectDependency));
 
       // Keep track of project dependency jars for filtering out later
       String configurationName = projectDependency.getTargetConfiguration();
       if (configurationName == null) {
         configurationName = "default";
       }
-      Project dependencyProject = projectDependency.getDependencyProject();
+      Project dependencyProject = getDependencyProject(projectDependency);
       for (Configuration targetConfiguration :
           dependencyProject.getConfigurations().getByName(configurationName).getHierarchy()) {
         for (PublishArtifact artifact : targetConfiguration.getArtifacts()) {
@@ -142,11 +157,7 @@ private void addGradleFiles(Project project) {
     skaffoldFilesOutput.addBuild(project.getBuildFile().toPath());
 
     // Add settings.gradle
-    if (GradleVersion.current().compareTo(GRADLE_9) < 0
-        && project.getGradle().getStartParameter().getSettingsFile() != null) {
-      skaffoldFilesOutput.addBuild(
-          project.getGradle().getStartParameter().getSettingsFile().toPath());
-    } else if (Files.exists(projectPath.resolve(Settings.DEFAULT_SETTINGS_FILE))) {
+    if (Files.exists(projectPath.resolve(Settings.DEFAULT_SETTINGS_FILE))) {
       skaffoldFilesOutput.addBuild(projectPath.resolve(Settings.DEFAULT_SETTINGS_FILE));
     }
 
@@ -212,7 +223,7 @@ private Set<ProjectDependency> findProjectDependencies(Project project) {
               // If this is a project dependency, save it
               ProjectDependency projectDependency = (ProjectDependency) dependency;
               if (!projectDependencies.contains(projectDependency)) {
-                projects.push(projectDependency.getDependencyProject());
+                projects.push(getDependencyProject(projectDependency));
                 projectDependencies.add(projectDependency);
               }
             }
diff --git a/jib-gradle-plugin/src/test/java/com/google/cloud/tools/jib/gradle/GradleProjectPropertiesTest.java b/jib-gradle-plugin/src/test/java/com/google/cloud/tools/jib/gradle/GradleProjectPropertiesTest.java
index 7698228ab0..8fdd34a9ac 100644
--- a/jib-gradle-plugin/src/test/java/com/google/cloud/tools/jib/gradle/GradleProjectPropertiesTest.java
+++ b/jib-gradle-plugin/src/test/java/com/google/cloud/tools/jib/gradle/GradleProjectPropertiesTest.java
@@ -168,7 +168,7 @@ public void setUp() throws URISyntaxException, IOException {
             mockLogger,
             mockTempDirectoryProvider,
             mockExtensionLoader,
-            JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME);
+            "runtimeClasspath");
   }
 
   @Test
@@ -219,7 +219,7 @@ public void testGetInputFiles() throws URISyntaxException {
     List<Path> extraDirectories = Arrays.asList(applicationDirectory.resolve("extra-directory"));
     FileCollection fileCollection =
         GradleProjectProperties.getInputFiles(
-            project, extraDirectories, JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME);
+            project, extraDirectories, "runtimeClasspath");
 
     assertThat(fileCollection)
         .comparingElementsUsing(FILE_PATH_OF)
@@ -341,7 +341,7 @@ public void testCreateContainerBuilder_noClassesFiles()
             mockLogger,
             mockTempDirectoryProvider,
             mockExtensionLoader,
-            JavaPlugin.RUNTIME_CLASSPATH_CONFIGURATION_NAME);
+            "runtimeClasspath");
 
     gradleProjectProperties.createJibContainerBuilder(
         JavaContainerBuilder.from(RegistryImage.named("base")), ContainerizingMode.EXPLODED);
@@ -511,7 +511,7 @@ public void testGetWarFilePath_bootWarDisabled() throws IOException {
     project.getTasks().getByName("bootWar").setEnabled(false);
 
     assertThat(gradleProjectProperties.getWarFilePath())
-        .isEqualTo(outputDir.resolve("my-app.war").toString());
+        .isEqualTo(war.getArchiveFile().get().getAsFile().getAbsolutePath());
   }
 
   @Test
diff --git a/jib-gradle-plugin/src/test/java/com/google/cloud/tools/jib/gradle/JibPluginTest.java b/jib-gradle-plugin/src/test/java/com/google/cloud/tools/jib/gradle/JibPluginTest.java
index fe2829d0dd..5435783b86 100644
--- a/jib-gradle-plugin/src/test/java/com/google/cloud/tools/jib/gradle/JibPluginTest.java
+++ b/jib-gradle-plugin/src/test/java/com/google/cloud/tools/jib/gradle/JibPluginTest.java
@@ -204,7 +204,7 @@ public void testSpringBootJarProject_nonPackagedMode() {
 
     Jar jar = (Jar) project.getTasks().getByPath(":jar");
     assertThat(jar.getEnabled()).isFalse();
-    assertThat(jar.getArchiveClassifier().get()).isEmpty();
+    assertThat(jar.getArchiveClassifier().get()).isIn(ImmutableList.of("", "plain"));
   }
 
   @Test
@@ -214,6 +214,10 @@ public void testSpringBootJarProject_packagedMode() {
     JibExtension jibExtension = (JibExtension) project.getExtensions().getByName("jib");
     jibExtension.setContainerizingMode("packaged");
 
+    // Force empty classifier to ensure conflict with bootJar (which has empty classifier)
+    // This tests Jib's logic to rename jar to "original" on conflict.
+    project.getTasks().named("jar").configure(task -> ((Jar) task).getArchiveClassifier().set(""));
+
     Jar jar = (Jar) project.getTasks().getByPath(":jar");
     assertThat(jar.getEnabled()).isTrue();
     assertThat(jar.getArchiveClassifier().get()).isEqualTo("original");
@@ -244,7 +248,7 @@ public void testSpringBootJarProject_packagedMode_bootJarClassifierSet() {
 
     Jar jar = (Jar) project.getTasks().getByPath(":jar");
     assertThat(jar.getEnabled()).isTrue();
-    assertThat(jar.getArchiveClassifier().get()).isEmpty();
+    assertThat(jar.getArchiveClassifier().get()).isIn(ImmutableList.of("", "plain"));
   }
 
   @Test
@@ -255,6 +259,9 @@ public void testSpringBootJarProject_packagedMode_jarEnabled() {
     jibExtension.setContainerizingMode("packaged");
     project.getTasks().named("jar").configure(task -> task.setEnabled(true));
 
+    // Force empty classifier to ensure conflict with bootJar
+    project.getTasks().named("jar").configure(task -> ((Jar) task).getArchiveClassifier().set(""));
+
     TaskContainer tasks = project.getTasks();
     Exception exception = assertThrows(GradleException.class, () -> tasks.getByPath(":jar"));
     assertThat(exception.getCause())
@@ -293,7 +300,7 @@ public void testSpringBootJarProject_packagedMode_jarEnabledAndBootJarClassifier
 
     Jar jar = (Jar) project.getTasks().getByPath(":jar");
     assertThat(jar.getEnabled()).isTrue();
-    assertThat(jar.getArchiveClassifier().get()).isEmpty();
+    assertThat(jar.getArchiveClassifier().get()).isIn(ImmutableList.of("", "plain"));
   }
 
   @Test
@@ -308,7 +315,7 @@ public void testSpringBootJarProject_packagedMode_jarEnabledAndBootJarDisabled()
     Jar jar = (Jar) project.getTasks().getByPath(":jar");
     assertThat(jar.getEnabled()).isTrue();
     assertThat(project.getTasks().getByPath(":bootJar").getEnabled()).isFalse();
-    assertThat(jar.getArchiveClassifier().get()).isEmpty();
+    assertThat(jar.getArchiveClassifier().get()).isIn(ImmutableList.of("", "plain"));
   }
 
   @Test
diff --git a/jib-gradle-plugin/src/test/java/com/google/cloud/tools/jib/gradle/TestProject.java b/jib-gradle-plugin/src/test/java/com/google/cloud/tools/jib/gradle/TestProject.java
index ca3f6aed78..0ad29238df 100644
--- a/jib-gradle-plugin/src/test/java/com/google/cloud/tools/jib/gradle/TestProject.java
+++ b/jib-gradle-plugin/src/test/java/com/google/cloud/tools/jib/gradle/TestProject.java
@@ -25,6 +25,7 @@
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.List;
+import org.gradle.api.JavaVersion;
 import org.gradle.testkit.runner.BuildResult;
 import org.gradle.testkit.runner.GradleRunner;
 import org.junit.rules.TemporaryFolder;
@@ -55,7 +56,10 @@ private static void copyProject(String projectName, Path destination)
   }
 
   private final String testProjectName;
-  private String gradleVersion = JibPlugin.GRADLE_MIN_VERSION.getVersion();
+  private String gradleVersion =
+      Integer.parseInt(JavaVersion.current().getMajorVersion()) >= 16
+          ? "8.5"
+          : JibPlugin.GRADLE_MIN_VERSION.getVersion();
   private GradleRunner gradleRunner;
 
   private Path projectRoot;
diff --git a/jib-maven-plugin-extension-api/build.gradle b/jib-maven-plugin-extension-api/build.gradle
index aa4b6ce45f..3a91d4beb0 100644
--- a/jib-maven-plugin-extension-api/build.gradle
+++ b/jib-maven-plugin-extension-api/build.gradle
@@ -44,7 +44,7 @@ publishing {
 release {
   tagTemplate = 'v$version-maven-extension'
   git {
-    requireBranch = /^maven-extension-release-v\d+.*$/  //regex
+    requireBranch.set(/^maven-extension-release-v\d+.*$/)
   }
 }
 /* RELEASE */
diff --git a/jib-maven-plugin/build.gradle b/jib-maven-plugin/build.gradle
index f8ead158cd..d61cfe0c53 100644
--- a/jib-maven-plugin/build.gradle
+++ b/jib-maven-plugin/build.gradle
@@ -71,7 +71,7 @@ release {
     'com.google.cloud.tools:jib-plugins-common',
   ]
   git {
-    requireBranch = /^maven-release-v\d+.*$/  //regex
+    requireBranch.set(/^maven-release-v\d+.*$/)
   }
 }
 /* RELEASE */
diff --git a/jib-plugins-extension-common/build.gradle b/jib-plugins-extension-common/build.gradle
index 5151d6a891..8fcbf97d40 100644
--- a/jib-plugins-extension-common/build.gradle
+++ b/jib-plugins-extension-common/build.gradle
@@ -38,7 +38,7 @@ publishing {
 release {
   tagTemplate = 'v$version-extension-common'
   git {
-    requireBranch = /^extension-common-release-v\d+.*$/  //regex
+    requireBranch.set(/^extension-common-release-v\d+.*$/)
   }
 }
 /* RELEASE */