diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 302ee8f..f21d0a6 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -29,6 +29,12 @@ jobs:
           fi
           echo "version=$version" >> "$GITHUB_OUTPUT"
 
+      - name: Get lowercase owner
+        id: owner
+        env:
+          OWNER: ${{ github.repository_owner }}
+        run: echo "owner=$(echo "$OWNER" | tr '[:upper:]' '[:lower:]')" >> "$GITHUB_OUTPUT"
+
       - name: Populate version.json
         env:
           VERSION: ${{ steps.version.outputs.version }}
@@ -48,7 +54,7 @@ jobs:
         with:
           context: .
           push: true
-          tags: "ghcr.io/${{ github.repository_owner }}/web-api:${{ steps.version.outputs.version }}"
+          tags: "ghcr.io/${{ steps.owner.outputs.owner }}/web-api:${{ steps.version.outputs.version }}"
 
       - name: Update Terraform variable set
         env: