diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 2060a90..ec9b92e 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -21,8 +21,28 @@ jobs:
     name: tests
     strategy:
       matrix:
+        flask: ['<2.2', '<3.0', '<3.1', '<3.2', '']
         os: [ubuntu-latest, macos-latest, windows-latest]
         python: ['3.10', '3.11', '3.12', '3.13', '3.14', 'pypy-3.11']
+        exclude:
+          - flask: '<2.2'
+            python: '3.14'
+          - flask: '<2.2'
+            os: macos-latest
+          - flask: '<3.0'
+            os: macos-latest
+          - flask: '<3.1'
+            os: macos-latest
+          - flask: '<3.2'
+            os: macos-latest
+          - flask: '<2.2'
+            os: windows-latest
+          - flask: '<3.0'
+            os: windows-latest
+          - flask: '<3.1'
+            os: windows-latest
+          - flask: '<3.2'
+            os: windows-latest
       fail-fast: false
     runs-on: ${{ matrix.os }}
     steps:
@@ -33,6 +53,8 @@ jobs:
       - run: python -m pip install --upgrade pip wheel
       - run: pip install tox tox-gh-actions
       - run: tox
+        env:
+          FLASK_VERSION: ${{ matrix.flask }}
   coverage:
     name: coverage
     runs-on: ubuntu-latest
diff --git a/pyproject.toml b/pyproject.toml
index 4a86c1e..28639a4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,8 +14,13 @@ classifiers = [
 ]
 requires-python = ">=3.8"
 dependencies = [
+    "blinker",
+    "click",
+    "flask",
     "Flask >= 2.1.0",
+    "jinja2",
     "python-socketio >= 5.12.0",
+    "werkzeug",
 ]
 
 [project.readme]
@@ -31,10 +36,12 @@ docs = [
     "sphinx",
 ]
 dev = [
-    "tox",
+    "flask-login",
+    "flask-session",
     "pytest",
     "pytest-cov",
     "redis",
+    "tox",
 ]
 
 [tool.setuptools]
diff --git a/src/flask_socketio/__init__.py b/src/flask_socketio/__init__.py
index b202de4..2e9fb68 100644
--- a/src/flask_socketio/__init__.py
+++ b/src/flask_socketio/__init__.py
@@ -806,13 +806,22 @@ def _handle_event(self, handler, message, namespace, sid, *args):
                     environ['saved_session'] = _ManagedSession(flask.session)
                 session_obj = environ['saved_session']
                 if hasattr(flask, 'globals') and \
-                        hasattr(flask.globals, 'request_ctx'):
-                    # update session for Flask >= 2.2
-                    ctx = flask.globals.request_ctx._get_current_object()
+                        hasattr(flask.globals, 'app_ctx'):
+                    if hasattr(flask.globals.app_ctx, 'session'):
+                        # get context for flask >= 3.2
+                        ctx = flask.globals.app_ctx._get_current_object()
+                    else:
+                        # get context for Flask >= 2.2, < 3.2
+                        ctx = flask.globals.request_ctx._get_current_object()
                 else:  # pragma: no cover
-                    # update session for Flask < 2.2
+                    # get context for Flask < 2.2
                     ctx = flask._request_ctx_stack.top
-                ctx.session = session_obj
+                if hasattr(ctx, '_session'):
+                    # update session for Flask >= 3.1.3
+                    ctx._session = session_obj
+                else:
+                    # update session for Flask < 3.1.3
+                    ctx.session = session_obj
             else:
                 # let Flask handle the user session
                 # for cookie based sessions, this effectively freezes the
diff --git a/tox.ini b/tox.ini
index d63ac8e..7ac5a44 100644
--- a/tox.ini
+++ b/tox.ini
@@ -14,6 +14,7 @@ python =
 [testenv]
 commands=
     pip install -e .
+    pip install "flask{env:FLASK_VERSION:}" "werkzeug{env:FLASK_VERSION:}"
     pytest -p no:logging --cov=flask_socketio --cov-branch --cov-report=term-missing --cov-report=xml
 deps=
     pytest