diff --git a/.github/workflows/package-development-workflow.yml b/.github/workflows/package-development-workflow.yml
index 6e64e6b..1069ee4 100644
--- a/.github/workflows/package-development-workflow.yml
+++ b/.github/workflows/package-development-workflow.yml
@@ -27,7 +27,7 @@ jobs:
     name: Build and Test
     runs-on: ubuntu-24.04
     container:
-      image: ghcr.io/simatic-ax/ci-images/apax-ci-image:3.5.0
+      image: ghcr.io/simatic-ax/ci-images/apax-ci-image:4.2.0
       credentials:
         username: ${{ github.actor }}
         password: ${{ secrets.GITHUB_TOKEN }}
@@ -39,19 +39,19 @@ jobs:
           ref: ${{ inputs.ref != '' && inputs.ref || github.ref }}
 
       - name: Login to required registries
-        uses: simatic-ax/actions/apax-login@v3
+        uses: simatic-ax/actions/apax-login@v4
         with:
           apax-token: ${{ secrets.APAX_TOKEN }}
           registries: |
             https://npm.pkg.github.com/,${{ secrets.GITHUB_TOKEN }}
 
       - name: Install dependencies
-        uses: simatic-ax/actions/apax-install@v3
+        uses: simatic-ax/actions/apax-install@v4
         with:
           immutable: true
 
       - name: Build source code
-        uses: simatic-ax/actions/apax-build@v3
+        uses: simatic-ax/actions/apax-build@v4
         with:
           apax-build-targets: |
             llvm
@@ -61,7 +61,7 @@ jobs:
             --log Debug
 
       - name: Test source code
-        uses: simatic-ax/actions/apax-test@v3
+        uses: simatic-ax/actions/apax-test@v4
         with:
           coverage: true
           loglevel: debug
diff --git a/.github/workflows/package-release-workflow.yml b/.github/workflows/package-release-workflow.yml
index 424f17e..a74f726 100644
--- a/.github/workflows/package-release-workflow.yml
+++ b/.github/workflows/package-release-workflow.yml
@@ -28,7 +28,7 @@ jobs:
     needs: call-development
     runs-on: ubuntu-24.04
     container:
-      image: ghcr.io/simatic-ax/ci-images/apax-ci-image:3.5.0
+      image: ghcr.io/simatic-ax/ci-images/apax-ci-image:4.2.0
       credentials:
         username: ${{ github.actor }}
         password: ${{ secrets.GITHUB_TOKEN }}
@@ -49,17 +49,18 @@ jobs:
           path: bin
 
       - name: Version package
-        uses: simatic-ax/actions/apax-version@v3
+        uses: simatic-ax/actions/apax-version@v4
         with:
           version: ${{ github.event.release.tag_name }}
 
       - name: Package source code
-        uses: simatic-ax/actions/apax-pack@v3
+        uses: simatic-ax/actions/apax-pack@v4
         with:
           key: ${{ secrets.APAX_SIGNKEY_V2 }}
+          key-version: "v2"
 
       - name: Login to required registries
-        uses: simatic-ax/actions/apax-login@v3
+        uses: simatic-ax/actions/apax-login@v4
         with:
           apax-token: ${{ secrets.APAX_TOKEN }}
           registries: |
diff --git a/apax.yml b/apax.yml
index 18f9296..1d5c940 100644
--- a/apax.yml
+++ b/apax.yml
@@ -22,6 +22,10 @@ targets:
   - 'llvm'
 
 # Dependencies
+publicKeys:
+  "@simatic-ax":
+    "v1": "3792a7e926775425ccdd29ceed8c368c3008b5b33d7d5550b3cb1f58093e1dff"
+    "v2": "7af3e394eb2b285a3d99ab8e1f745cc6db75704b30a80393339c721a92ffffd9"
 catalogs:
   "@ax/simatic-ax": ^2510.0.0
 devDependencies: