diff --git a/pre_commit_hooks/check_merge_conflict.py b/pre_commit_hooks/check_merge_conflict.py
index 4a98843..d986998 100644
--- a/pre_commit_hooks/check_merge_conflict.py
+++ b/pre_commit_hooks/check_merge_conflict.py
@@ -2,7 +2,6 @@
 
 import argparse
 import os.path
-import sys
 
 CONFLICT_PATTERNS = [
     b'<<<<<<< ',
@@ -41,5 +40,6 @@
 
     return retcode
 
+
 if __name__ == '__main__':
-    sys.exit(detect_merge_conflict())
+    exit(detect_merge_conflict())