diff --git a/setup.py b/setup.py
index 7471035..c655595 100644
--- a/setup.py
+++ b/setup.py
@@ -23,6 +23,7 @@ requires = [
     'watchdog < 0.9.0',
     'pyramid-htmlmin',
     'pyramid-webpack',
+    'Babel',
 ]
 
 tests_require = [