diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 11d11fb..21590db 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -27,7 +27,7 @@ jobs:
           java-version: '21'
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v4
+        uses: gradle/actions/setup-gradle@v6
 
       # The default `check`/`test` gate excludes @Tag("benchmark") and @Tag("load") suites
       # (see BaseConventionPlugin) so it stays fast and deterministic.
@@ -88,7 +88,7 @@ jobs:
           java-version: '21'
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v4
+        uses: gradle/actions/setup-gradle@v6
 
       # Runs only @Tag("benchmark") suites across all modules. Informational signal for
       # regressions; replaced by a proper JMH harness in Phase 4 (see TESTING_STRATEGY.md).
diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 5822b60..977a416 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -48,7 +48,7 @@ jobs:
           distribution: temurin
           java-version: "21"
 
-      - uses: gradle/actions/setup-gradle@v4
+      - uses: gradle/actions/setup-gradle@v6
 
       # Pin the generated projects (and the header version) to the released Katalyst version, so the
       # live generator tracks whatever tag was cut. On a release it is the release tag; otherwise the
diff --git a/.github/workflows/plugin-ci.yml b/.github/workflows/plugin-ci.yml
index 9cb40f4..1b2895d 100644
--- a/.github/workflows/plugin-ci.yml
+++ b/.github/workflows/plugin-ci.yml
@@ -40,7 +40,7 @@ jobs:
           java-version: "21"
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v4
+        uses: gradle/actions/setup-gradle@v6
 
       # Compiles the plugin and assembles the distributable ZIP; fails the check on any error.
       - name: Build plugin
diff --git a/.github/workflows/release-library.yml b/.github/workflows/release-library.yml
index c94ced3..9e58bca 100644
--- a/.github/workflows/release-library.yml
+++ b/.github/workflows/release-library.yml
@@ -47,7 +47,7 @@ jobs:
           java-version: '21'
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v4
+        uses: gradle/actions/setup-gradle@v6
 
       - name: Publish
         env:
diff --git a/.github/workflows/release-plugin.yml b/.github/workflows/release-plugin.yml
index 8d3ae4b..3835b2f 100644
--- a/.github/workflows/release-plugin.yml
+++ b/.github/workflows/release-plugin.yml
@@ -50,7 +50,7 @@ jobs:
           java-version: "21"
 
       - name: Set up Gradle
-        uses: gradle/actions/setup-gradle@v4
+        uses: gradle/actions/setup-gradle@v6
 
       # Build + test first so a compile/test/packaging failure is caught before we touch the Marketplace.
       - name: Build & test plugin