diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 4dbe0eaec..02107d626 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -97,5 +97,5 @@ jobs:
     uses: ./.github/workflows/container-build.yml
     with:
       build-version: dev
-      tags:
-        - ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-${{ github.head_ref }}
+      tags: |
+        ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-${{ github.head_ref }}
diff --git a/.github/workflows/container-build.yml b/.github/workflows/container-build.yml
index 45fa77352..70cf96119 100644
--- a/.github/workflows/container-build.yml
+++ b/.github/workflows/container-build.yml
@@ -10,7 +10,7 @@ on:
       tags:
         description: "Tags to apply to the image"
         required: true
-        type: array
+        type: string
 
 jobs:
   containerbuild:
@@ -40,7 +40,7 @@ jobs:
           build-args: |
             LOGPREP_VERSION=${{ inputs.build-version }}
             PYTHON_VERSION=${{ matrix.python-version }}
-          tags: ${{ join(inputs.tags, '\n') }}
+          tags: ${{ inputs.tags }}
 
       - name: Ensure logprep is available in image
         run: |
diff --git a/.github/workflows/publish-latest-dev-release-to-github.yml b/.github/workflows/publish-latest-dev-release-to-github.yml
index 98c6af689..756732272 100644
--- a/.github/workflows/publish-latest-dev-release-to-github.yml
+++ b/.github/workflows/publish-latest-dev-release-to-github.yml
@@ -51,6 +51,6 @@ jobs:
     needs: create-github-prerelease
     with:
       build-version: ${{ github.ref_name }}
-      tags:
-        - ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-main
-        - ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-latest
+      tags: |
+        ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-main
+        ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-latest
diff --git a/.github/workflows/publish-release-to-pypi.yml b/.github/workflows/publish-release-to-pypi.yml
index b396ccfad..27834e772 100644
--- a/.github/workflows/publish-release-to-pypi.yml
+++ b/.github/workflows/publish-release-to-pypi.yml
@@ -64,7 +64,7 @@ jobs:
     needs: publish-latest-release-to-pypi
     with:
       build-version: ${{ github.ref_name }}
-      tags:
-        - ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-${{ github.ref_name }}
-        - ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-stable
-        - ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-latest
+      tags: |
+        ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-${{ github.ref_name }}
+        ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-stable
+        ghcr.io/fkie-cad/logprep:py${{ matrix.python-version }}-latest