diff --git a/zuul-core/build.gradle b/zuul-core/build.gradle
index a7c330c8b1..7734f95533 100644
--- a/zuul-core/build.gradle
+++ b/zuul-core/build.gradle
@@ -11,9 +11,9 @@ dependencies {
     // TODO(carl-mastrangelo): this can be implementation; remove Logger from public api points.
     api libraries.slf4j
 
-    implementation 'org.bouncycastle:bcprov-jdk18on:1.83'
-    implementation 'org.bouncycastle:bcpkix-jdk18on:1.83'
-    implementation 'org.bouncycastle:bctls-jdk18on:1.83'
+    implementation 'org.bouncycastle:bcprov-jdk18on:1.84'
+    implementation 'org.bouncycastle:bcpkix-jdk18on:1.84'
+    implementation 'org.bouncycastle:bctls-jdk18on:1.84'
 
     implementation 'com.fasterxml.jackson.core:jackson-core:2.19.2'
     api 'com.fasterxml.jackson.core:jackson-databind:2.19.2'