diff --git a/chaquo/src/main/python/base/spider.py b/chaquo/src/main/python/base/spider.py
index 2560db238..fc0c0c6bb 100644
--- a/chaquo/src/main/python/base/spider.py
+++ b/chaquo/src/main/python/base/spider.py
@@ -80,7 +80,7 @@ class Spider(metaclass=ABCMeta):
         path = os.path.join(os.path.join(cache_dir, 'py'),  f'{name}.py')
         return SourceFileLoader(name, path).load_module()
 
-    def regStr(self, src, reg, group=1):
+    def regStr(self, reg, src, group=1):
         m = re.search(reg, src)
         src = ''
         if m: