diff --git a/lib/index.js b/lib/index.js
index 7081530..a49e47e 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -166,11 +166,20 @@ export async function downloadUpdate(options, eventListeners) {
   }
   if (options.diffUrl) {
     logger('downloading diff');
-    await Pushy.downloadPatchFromPpk({
-      updateUrl: options.diffUrl,
-      hash: options.hash,
-      originHash: currentVersion,
-    });
+    try {
+      await Pushy.downloadPatchFromPpk({
+        updateUrl: options.diffUrl,
+        hash: options.hash,
+        originHash: currentVersion,
+      });
+    } catch (e) {
+      logger(e.message);
+      logger('diff error, try pdiff');
+      await Pushy.downloadPatchFromPackage({
+        updateUrl: options.pdiffUrl,
+        hash: options.hash,
+      });
+    }
   } else if (options.pdiffUrl) {
     logger('downloading pdiff');
     await Pushy.downloadPatchFromPackage({