diff --git a/.gitea/workflows/build.yml b/.gitea/workflows/build.yml
index e46468c..202332d 100644
--- a/.gitea/workflows/build.yml
+++ b/.gitea/workflows/build.yml
@@ -105,8 +105,8 @@ jobs:
         run: |
           docker push "${REGISTRY_HOST}/${PAGE_FETCHER_API_IMAGE}:${IMAGE_TAG}"
 
-      - name: Reclaim disk space
+      - name: Reclaim disk space (keep recent build cache)
         if: always()
         run: |
-          docker image prune -af
-          docker builder prune -af
\ No newline at end of file
+          docker image prune -f   # dangling only (keep base images)
+          docker builder prune -f --filter until=336h   # keep ~2 weeks of layer cache
\ No newline at end of file