diff --git a/.gitea/workflows/docker.yml b/.gitea/workflows/docker.yml
index e9e8bd4..f31c354 100644
--- a/.gitea/workflows/docker.yml
+++ b/.gitea/workflows/docker.yml
@@ -57,5 +57,7 @@ jobs:
           platforms: linux/arm64
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
+          # Registry-based cache: uses the image registry itself for layer reuse.
+          # Avoids the unreliable Gitea Actions cache HTTP backend.
+          cache-from: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache
+          cache-to: type=registry,ref=${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:buildcache,mode=max