diff --git a/.github/workflows/build_docker.yml b/.github/workflows/build_docker.yml
index fa36a6dc4..dc6c8b939 100644
--- a/.github/workflows/build_docker.yml
+++ b/.github/workflows/build_docker.yml
@@ -21,7 +21,9 @@ jobs:
         uses: voxpupuli/gha-build-and-publish-a-container@v2
         with:
           registry_password: ${{ secrets.GITHUB_TOKEN }}
-          build_args: 'PUPPET_RELEASE=7,PUPPET_VERSION=${{ github.ref_name }}'
+          build_args: |
+            PUPPET_RELEASE=7
+            PUPPET_VERSION=${{ github.ref_name }}
           build_arch: linux/amd64,linux/arm64
           build_context: puppetdb
           buildfile: puppetdb/Dockerfile
@@ -31,7 +33,9 @@ jobs:
         uses: voxpupuli/gha-build-and-publish-a-container@v2
         with:
           registry_password: ${{ secrets.GITHUB_TOKEN }}
-          build_args: 'PUPPET_RELEASE=8,PUPPET_VERSION=${{ github.ref_name }}'
+          build_args: |
+            PUPPET_RELEASE=8
+            PUPPET_VERSION=${{ github.ref_name }}
           build_arch: linux/amd64,linux/arm64
           build_context: puppetdb
           buildfile: puppetdb/Dockerfile