diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index daf56aae..8cb9b13e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -29,13 +29,13 @@ jobs:
 
       - name: Cache node_modules
         id: cache-modules
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: node_modules
           key: node-modules-${{ env.CACHE_VERSION }}-${{ runner.os }}-${{ hashFiles('**/bun.lock', '**/package.json') }}
 
       - name: Cache Bun packages
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~/.bun/install/cache
           key: bun-packages-${{ env.CACHE_VERSION }}-${{ runner.os }}-${{ hashFiles('**/bun.lock', '**/package.json') }}
diff --git a/.github/workflows/mutation-testing.yml b/.github/workflows/mutation-testing.yml
index 666223d0..4101d5c6 100644
--- a/.github/workflows/mutation-testing.yml
+++ b/.github/workflows/mutation-testing.yml
@@ -63,7 +63,7 @@ jobs:
 
       - name: Cache node_modules
         id: cache-modules
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: node_modules
           key: node-modules-${{ runner.os }}-${{ hashFiles('**/bun.lock', '**/package.json') }}
@@ -75,7 +75,7 @@ jobs:
         run: bun install --frozen-lockfile
 
       - name: Restore Stryker incremental cache
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: reports/mutation/stryker-incremental.json
           key: stryker-incremental-${{ matrix.area }}-${{ github.base_ref || 'main' }}-${{ hashFiles('src/lib/state-machines/**', 'src/services/rbac*.ts', 'src/lib/api/auth-middleware.ts', 'src/lib/api/rbac-middleware.ts', 'src/services/agent/agent-execution.service.ts', 'src/services/container-agent/plan-approval.service.ts', 'src/services/task.service.ts', 'src/lib/agents/stream-handler.ts') }}
@@ -130,7 +130,7 @@ jobs:
 
       - name: Save Stryker incremental cache
         if: always()
-        uses: actions/cache/save@v5
+        uses: actions/cache/save@v6
         with:
           path: reports/mutation/stryker-incremental.json
           key: stryker-incremental-${{ matrix.area }}-${{ github.base_ref || 'main' }}-${{ hashFiles('src/lib/state-machines/**', 'src/services/rbac*.ts', 'src/lib/api/auth-middleware.ts', 'src/lib/api/rbac-middleware.ts', 'src/services/agent/agent-execution.service.ts', 'src/services/container-agent/plan-approval.service.ts', 'src/services/task.service.ts', 'src/lib/agents/stream-handler.ts') }}