diff --git a/.github/workflows/containers.yml b/.github/workflows/containers.yml
index c7df066d41c..6a06f99fb71 100644
--- a/.github/workflows/containers.yml
+++ b/.github/workflows/containers.yml
@@ -18,7 +18,7 @@ jobs:
   build:
     runs-on: blacksmith-4vcpu-ubuntu-2404
     env:
-      REGISTRY: ghcr.io/${{ github.repository_owner }}
+      REGISTRY: ghcr.io/${{ toLower(github.repository_owner) }}
       TAG: "24.04"
     steps:
       - uses: actions/checkout@v4