diff --git a/script.user.js b/script.user.js
index 2f1d6a4..576cd60 100644
--- a/script.user.js
+++ b/script.user.js
@@ -216,14 +216,18 @@ function createSettingElement(key, [label, value, editable]) {
       }
 
       var res = await api("repos/migrate", _data);
-      var resp = JSON.parse(res);
+      try {
+        var resp = JSON.parse(res);
 
-      if (resp.message) {
-        if (resp.message == "The repository with the same name already exists.") {
-          window.open(`${config.instance}/mirrors/${repo}`);
-        } else alert(resp.message);
-      } else {
-        window.open(resp.html_url);
+        if (resp.message) {
+          if (resp.message == "The repository with the same name already exists.") {
+            window.open(`${config.instance}/mirrors/${repo}`);
+          } else alert(resp.message);
+        } else {
+          window.open(resp.html_url);
+        }
+      } catch (err) {
+        alert(err);
       }
     };