diff --git a/crawler.py b/crawler.py
index e5fcc1e..1b531b6 100644
--- a/crawler.py
+++ b/crawler.py
@@ -76,6 +76,7 @@ def filteringcon(filters_regex_one):
         for line in lines:
             if not line.endswith((tuple(remove_words))):
                 f.write('\n'.join([line + '\n']))
+            f.close()
 
 def killingdup(duplicated_file):
     print('Getting rid of duplicated line')