diff --git a/lib/datasource/index.ts b/lib/datasource/index.ts
index 7c6c073130b5d4827a05a84c4506ffc65a394037..0baf27680ba87e25acc12e537c54490e808df300 100644
--- a/lib/datasource/index.ts
+++ b/lib/datasource/index.ts
@@ -113,6 +113,7 @@ export async function getPkgReleases(
       log('Server Error');
     } else {
       log('Unknown', 'info');
+      logger.debug({ err }, 'Datasource Error err');
     }
   }
   if (!res) {