diff --git a/.gitea/workflows/docker-build.yml b/.gitea/workflows/docker-build.yml
index fd42b22..dc900f3 100644
--- a/.gitea/workflows/docker-build.yml
+++ b/.gitea/workflows/docker-build.yml
@@ -14,7 +14,7 @@ on:
 
 env:
   REGISTRY: code.littlelan.cn
-  IMAGE_NAME: ${{ github.repository_owner }}/carrotskin
+  IMAGE_NAME: ${{ tolower(github.repository_owner) }}/carrotskin
 
 jobs:
   build-and-push: