diff --git a/main.py b/main.py
index b3ef71c..c0ad236 100644
--- a/main.py
+++ b/main.py
@@ -140,8 +140,10 @@ def h5group(nickname, db: Session = Depends(get_db)):
     pattern = r'收到(\w+)的在看'
     print(newtext)
     matches = re.findall(pattern, newtext)
-    matchesString=matches[0]
-    if matches:
+    matchesString=None
+    if len(matches)>0:  
+        matchesString=matches[0]
+    if matchesString:
         print("匹配到的结果：", matchesString)
             # 判断是否在群中
         inGroup = False