diff --git a/webpack_loader/config.py b/webpack_loader/config.py
index 213df350..5ac1c6e6 100644
--- a/webpack_loader/config.py
+++ b/webpack_loader/config.py
@@ -14,7 +14,7 @@
         # FIXME: Explore usage of fsnotify
         'POLL_INTERVAL': 0.1,
         'TIMEOUT': None,
-        'IGNORE': ['.+\.hot-update.js', '.+\.map'],
+        'IGNORE': [r'.+\.hot-update.js', r'.+\.map'],
         'LOADER_CLASS': 'webpack_loader.loader.WebpackLoader',
     }
 }