diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 52c2e9f..2e210ed 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -33,6 +33,9 @@ jobs:
         uses: docker/setup-buildx-action@v4
       - name: Login to GHCR
         run: echo "${{secrets.GITHUB_TOKEN}}" | docker login ghcr.io -u "${{ github.actor }}" --password-stdin
+      - name: Lowercase image repository name
+        id: image
+        run: echo "repo=${GITHUB_REPOSITORY,,}" >> "$GITHUB_OUTPUT"
       - name: Docker Build and Push
         uses: docker/build-push-action@v7
         with:
@@ -44,8 +47,8 @@ jobs:
             org.opencontainers.image.version=${{ github.ref_name }}
             org.opencontainers.image.revision=${{ github.sha }}
           tags: |
-            ghcr.io/${{ github.repository }}:${{ github.ref_name }}
-            ghcr.io/${{ github.repository }}:latest
+            ghcr.io/${{ steps.image.outputs.repo }}:${{ github.ref_name }}
+            ghcr.io/${{ steps.image.outputs.repo }}:latest
       - name: Build and publish to pypi
         uses: JRubics/poetry-publish@v2.1
         with:
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 693901b..b33d8db 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -127,6 +127,9 @@ jobs:
         uses: docker/setup-buildx-action@v4
       - name: Login to GHCR
         run: echo "${{secrets.GITHUB_TOKEN}}" | docker login ghcr.io -u "${{ github.actor }}" --password-stdin
+      - name: Lowercase image repository name
+        id: image
+        run: echo "repo=${GITHUB_REPOSITORY,,}" >> "$GITHUB_OUTPUT"
       - name: Docker Build
         uses: docker/build-push-action@v7
         with:
@@ -140,4 +143,4 @@ jobs:
             org.opencontainers.image.version=${{ github.ref_name }}
             org.opencontainers.image.revision=${{ github.sha }}
           tags: |
-            ghcr.io/${{ github.repository }}:${{ github.sha }}
+            ghcr.io/${{ steps.image.outputs.repo }}:${{ github.sha }}