diff --git a/.github/workflows/test_integration.yml b/.github/workflows/test_integration.yml
index 3ee6011..cde0fe2 100644
--- a/.github/workflows/test_integration.yml
+++ b/.github/workflows/test_integration.yml
@@ -10,7 +10,7 @@ jobs:
     - uses: actions/checkout@master
     - name: Publish to Registry
       if: ${{ github.actor != 'dependabot[bot]' }}
-      uses: elgohr/Publish-Docker-Github-Action@master
+      uses: ./
       with:
         name: lgohr/publish-docker-github-action
         username: ${{ secrets.DOCKER_USERNAME }}
diff --git a/.github/workflows/test_integration_github.yml b/.github/workflows/test_integration_github.yml
index 41f28f6..38fdc7b 100644
--- a/.github/workflows/test_integration_github.yml
+++ b/.github/workflows/test_integration_github.yml
@@ -10,7 +10,7 @@ jobs:
     - uses: actions/checkout@master
     - name: Publish to Registry
       if: ${{ github.actor != 'dependabot[bot]' }}
-      uses: elgohr/Publish-Docker-Github-Action@master
+      uses: ./
       with:
         name: docker.pkg.github.com/elgohr/publish-docker-github-action/publish-docker-github-action
         username: ${{ github.actor }}
diff --git a/Dockerfile b/Dockerfile
index ab3abe1..9ef7886 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker:20.10.6 as runtime
+FROM docker:20.10.8@sha256:ddf0d732dcbc3e2087836e06e50cc97e21bfb002a49c7d0fe767f6c31e01d65f as runtime
 LABEL "repository"="https://github.com/elgohr/Publish-Docker-Github-Action"
 LABEL "maintainer"="Lars Gohr"