diff --git a/.github/workflows/build-docker.yml b/.github/workflows/build-docker.yml
index 8b34224..e1ac821 100644
--- a/.github/workflows/build-docker.yml
+++ b/.github/workflows/build-docker.yml
@@ -8,7 +8,7 @@ on:
 
 env:
   REGISTRY: ghcr.io
-  IMAGE_NAME: ${{ github.repository }}
+  IMAGE_NAME: $(echo ${{ github.repository }} | tr '[:upper:]' '[:lower:]')
 
 jobs:
   docker: