diff --git a/repo.py b/repo.py
index f52e0b00..69be67ca 100644
--- a/repo.py
+++ b/repo.py
@@ -36,7 +36,7 @@ def get_modules_path(self):
         return os.path.join(self.get_absolute_path(), 'module-types')
 
     def slug_format(self, name):
-        return re_sub('\W+', '-', name.lower())
+        return re_sub(r'\W+', '-', name.lower())
 
     def pull_repo(self):
         try: