diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 735928b..df6f772 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,7 +13,7 @@ on:
 
 env:
   REGISTRY: ghcr.io
-  IMAGE_NAME: ${{ github.repository }}
+  IMAGE_NAME: ${{ github.repository.lowercase }}
 
 jobs:
   build: