diff --git a/.github/workflows/container_upload.yml b/.github/workflows/container_upload.yml
index 773c4ff..d7c9fde 100644
--- a/.github/workflows/container_upload.yml
+++ b/.github/workflows/container_upload.yml
@@ -41,5 +41,5 @@ jobs:
           context: docker
           push: true
           tags: |
-            ghcr.io/${{ github.repository_owner }}/tmate-minimal:latest
+            ghcr.io/${{ github.repository_owner.lowercase }}/tmate-minimal:latest
           outputs: type=image,compression=zstd,push=true
diff --git a/.github/workflows/dispatch_container_upload.yml b/.github/workflows/dispatch_container_upload.yml
index f040ae2..bd1b218 100644
--- a/.github/workflows/dispatch_container_upload.yml
+++ b/.github/workflows/dispatch_container_upload.yml
@@ -37,5 +37,5 @@ jobs:
           context: docker
           push: true
           tags: |
-            ghcr.io/${{ github.repository_owner }}/tmate-minimal:latest
+            ghcr.io/${{ github.repository_owner.lowercase }}/tmate-minimal:latest
           outputs: type=image,compression=zstd,push=true