diff --git a/setup.py b/setup.py
index 03d7c5833..12c6e06ad 100755
--- a/setup.py
+++ b/setup.py
@@ -86,6 +86,7 @@ setup(
     },
 
     install_requires=[
+        'six',
         'enum34>=1.0.4',
         'mutagen>=1.27',
         'munkres',