diff --git a/.github/workflows/docker-build-push.yml b/.github/workflows/docker-build-push.yml
index 11a5755..0802805 100644
--- a/.github/workflows/docker-build-push.yml
+++ b/.github/workflows/docker-build-push.yml
@@ -32,11 +32,12 @@ jobs:
         id: git_sha
         run: echo "sha=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
 
-      - name: Define Image Names
+      - name: Define Image Names in Lowercase
         id: image_names
         run: |
-          echo "backend_image=ghcr.io/${{ github.repository_owner }}/utools-backend" >> $GITHUB_OUTPUT
-          echo "frontend_image=ghcr.io/${{ github.repository_owner }}/utools-frontend" >> $GITHUB_OUTPUT
+          OWNER_LC=$(echo "${{ github.repository_owner }}" | tr '[:upper:]' '[:lower:]')
+          echo "backend_image=ghcr.io/$OWNER_LC/utools-backend" >> $GITHUB_OUTPUT
+          echo "frontend_image=ghcr.io/$OWNER_LC/utools-frontend" >> $GITHUB_OUTPUT
 
       - name: Build images using compose.build.yml
         env:
diff --git a/compose.build.yml b/compose.build.yml
index faabf85..b7faafd 100644
--- a/compose.build.yml
+++ b/compose.build.yml
@@ -7,12 +7,10 @@ services:
       args:
         - GIT_COMMIT_SHA=${GIT_COMMIT_SHA:-unknown}
         - SENTRY_DSN=${SENTRY_DSN:-}
-    # Legt den Namen für das gebaute Image fest
     image: ghcr.io/mrunknownde/utools-backend:latest
 
   frontend:
     # Definiert, wie das Image gebaut wird
     build:
       context: ./frontend
-    # Legt den Namen für das gebaute Image fest
     image: ghcr.io/mrunknownde/utools-frontend:latest
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