diff --git a/.github/workflows/aws-lambda-java-profiler.yml b/.github/workflows/aws-lambda-java-profiler.yml
index 485d9311..a098bfd1 100644
--- a/.github/workflows/aws-lambda-java-profiler.yml
+++ b/.github/workflows/aws-lambda-java-profiler.yml
@@ -22,17 +22,17 @@ jobs:
       contents: read
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
       - name: Set up JDK
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5
         with:
           java-version: 21
           distribution: corretto
           cache: maven
 
       - name: Issue AWS credentials
-        uses: aws-actions/configure-aws-credentials@v4
+        uses: aws-actions/configure-aws-credentials@7474bc4690e29a8392af63c5b98e7449536d5c3a # v4
         with:
           aws-region: ${{ secrets.AWS_REGION_PROFILER_EXTENSION_INTEGRATION_TEST }}
           role-to-assume: ${{ secrets.AWS_ROLE_PROFILER_EXTENSION_INTEGRATION_TEST }}
@@ -68,7 +68,7 @@ jobs:
         run: ./integration_tests/download_from_s3.sh
 
       - name: Upload profiles
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
         with:
           name: profiles
           path: /tmp/s3-artifacts 
diff --git a/.github/workflows/runtime-interface-client_pr.yml b/.github/workflows/runtime-interface-client_pr.yml
index e0522005..a0d8c6cc 100644
--- a/.github/workflows/runtime-interface-client_pr.yml
+++ b/.github/workflows/runtime-interface-client_pr.yml
@@ -22,10 +22,10 @@ jobs:
   smoke-test:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
     - name: Set up JDK 1.8
-      uses: actions/setup-java@v5
+      uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5
       with:
         java-version: 8
         distribution: corretto
@@ -48,10 +48,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v6
+    - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6
 
     - name: Set up JDK 1.8
-      uses: actions/setup-java@v5
+      uses: actions/setup-java@be666c2fcd27ec809703dec50e508c2fdc7f6654 # v5
       with:
         java-version: 8
         distribution: corretto
@@ -61,7 +61,7 @@ jobs:
       uses: docker/setup-qemu-action@c7c53464625b32c7a7e944ae62b3e17d2b600130 # v3
 
     - name: Set up Docker Buildx
-      uses: docker/setup-buildx-action@v3
+      uses: docker/setup-buildx-action@8d2750c68a42422c14e847fe6c8ac0403b4cbd6f # v3
       with:
         install: true
 
@@ -83,7 +83,7 @@ jobs:
         IS_JAVA_8: true
 
     - name: Save the built jar
-      uses: actions/upload-artifact@v4
+      uses: actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02 # v4
       with:
         name: aws-lambda-java-runtime-interface-client
         path: ./aws-lambda-java-runtime-interface-client/target/aws-lambda-java-runtime-interface-client-*.jar