diff --git a/twitter.py b/twitter.py
index 30a2a27..ed3aeb8 100644
--- a/twitter.py
+++ b/twitter.py
@@ -86,6 +86,7 @@ def get_timeline(driver, url):
                 resp = driver.execute_cdp_cmd('Network.getResponseBody', {'requestId': request_id})
                 return json.loads(resp["body"])
     except:
+        logger.error("check failed")
         return {}
     
     
@@ -196,9 +197,12 @@ def filter_tweets(tweets, filter_list):
 
 def check_timeline(driver, config):
     data = get_timeline(driver, config["url"])
-    tweets = parse_timeline(data)
-    new_tweets = check_new_tweets(tweets, config["url"])
-    return filter_tweets(new_tweets, config["filter"])
+    if data:
+        tweets = parse_timeline(data)
+        new_tweets = check_new_tweets(tweets, config["url"])
+        return filter_tweets(new_tweets, config["filter"])
+    else:
+        return []