diff --git a/sourceloader.py b/sourceloader.py
index c279723..78cbd91 100644
--- a/sourceloader.py
+++ b/sourceloader.py
@@ -13,7 +13,7 @@ class SourceLoader:
         known_parser = set()
 
         for py in [f[:-3] for f in os.listdir(path) if f.endswith('.py') and f != '__init__.py']:
-            mod = __import__('.'.join([rel_dir.replace("\\", "."), py]), fromlist=[py])
+            mod = __import__('.'.join([rel_dir.replace('\\', "."), py]), fromlist=[py])
             classes = [getattr(mod, x) for x in dir(mod) if inspect.isclass(getattr(mod, x))]
             for cls in classes:
                 if issubclass(cls, Source) and cls not in known_parser: