diff --git a/.github/workflows/verify.yml b/.github/workflows/verify.yml
index a00ef48b0c..11ae41e046 100644
--- a/.github/workflows/verify.yml
+++ b/.github/workflows/verify.yml
@@ -7,8 +7,8 @@ jobs:
   pmd:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-java@v5
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6
+      - uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654  # v5
         with:
           distribution: 'temurin'
           java-version: '21'
@@ -19,8 +19,8 @@ jobs:
   checkstyle:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v6
-      - uses: actions/setup-java@v5
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6
+      - uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654  # v5
         with:
           distribution: 'temurin'
           java-version: '21'
@@ -31,20 +31,18 @@ jobs:
   maven-verify:
     runs-on: ubuntu-24.04
     steps:
-      - name: Set up Maven
-        uses: stCarolas/setup-maven@v5
-        with:
-          maven-version: 3.9.13
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd  # v6
       - name: Set up JDK 21
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654  # v5
         with:
           distribution: 'temurin'
           java-version: '21'
+      - name: Log Maven version
+        run: mvn --version
       - name: Set up Workspace Enviroment Variable
         run: echo "WORKSPACE=${{ github.workspace }}" >> $GITHUB_ENV
       - name: Cache Maven dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae  # v5
         with:
           path: /home/runner/.m2/repository
           key: ${{ runner.os }}-maven-0-${{ hashFiles('**/pom.xml') }}
@@ -54,7 +52,7 @@ jobs:
         run: xvfb-run mvn clean verify checkstyle:check pmd:pmd pmd:cpd pmd:check pmd:cpd-check spotbugs:check -f ./ddk-parent/pom.xml --batch-mode --fail-at-end
       - name: Archive Tycho Surefire Plugin
         if: ${{ failure() }}
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a  # v7
         with:
           name: tycho-surefire-plugin
           path: ${{ env.GITHUB_WORKSPACE }}/com.avaloq.tools.ddk.xtext.test/target/work/data/.metadata/.log