diff --git a/.woodpecker/build-image.yml b/.woodpecker/build-image.yml
index 550732b..ac10b67 100644
--- a/.woodpecker/build-image.yml
+++ b/.woodpecker/build-image.yml
@@ -28,6 +28,6 @@ steps:
       password:
         from_secret: registry-password
       # replace invalid characters in branch name
-      tags: ${CI_COMMIT_BRANCH,,}
+      tags: ${CI_COMMIT_BRANCH,,/\//-}
       # auto_tag: true
       # cache: true