diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index fbdd1883..dfda4707 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,19 +17,19 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v7.0.0
+        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
 
       - name: Copy CI gradle.properties
         run: mkdir -p ~/.gradle ; cp .github/ci-gradle.properties ~/.gradle/gradle.properties
 
       - name: Set up JDK 25
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v5.0.0
         with:
           distribution: 'zulu'
           java-version: 25
 
       - name: Set up Node.js
-        uses: actions/setup-node@v6
+        uses: actions/setup-node@2028fbc5c25fe9cf00d9f06a71cc4710d4507903 # v6.0.0
         with:
           node-version: '20'
 
@@ -68,7 +68,7 @@ jobs:
 
       - name: Upload all test reports
         if: always()
-        uses: actions/upload-artifact@v7
+        uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
         with:
           name: test-reports
           path: |