diff --git a/setup.py b/setup.py
index 15695faaf5..134b33e1e3 100644
--- a/setup.py
+++ b/setup.py
@@ -64,5 +64,6 @@
         'glyphsLib',
         'defcon',
         'unicodedata2',
+        'gflanguages',
     ]
 )