diff --git a/.gitea/workflows/build-and-push.yaml b/.gitea/workflows/build-and-push.yaml
index 048ca40..9f883ae 100644
--- a/.gitea/workflows/build-and-push.yaml
+++ b/.gitea/workflows/build-and-push.yaml
@@ -409,7 +409,9 @@ jobs:
 
           echo "📦 Processing README.md for Docker Hub (${DH_URL})..."
 
-          sed "s|${GITEA_URL}|${DH_URL}|g" README.md > README_DH.md
+          # Ersetzt die Image-URL NUR dann, wenn kein http:// oder https:// davor steht
+          export GITEA_URL DH_URL
+          python3 -c 'import os, re; content = open("README.md", "r", encoding="utf-8").read(); new_content = re.sub(r"(?<!https://)(?<!http://)" + re.escape(os.environ["GITEA_URL"]), os.environ["DH_URL"], content); open("README_DH.md", "w", encoding="utf-8").write(new_content)'
 
           jq -n \
             --arg desc "$SHORT_DESC" \