diff --git a/setup.py b/setup.py
index bb9fb52..e4994f3 100644
--- a/setup.py
+++ b/setup.py
@@ -16,7 +16,7 @@ if sys.argv[-1] == 'publish':
 
 packages = ['colout']
 
-requires = []
+requires = ['pygments']
 
 setup(
     name='colout',