diff --git a/setup.py b/setup.py
index c0733d5f0..3438781b2 100644
--- a/setup.py
+++ b/setup.py
@@ -57,6 +57,7 @@ REQUIRED = [
     "tornado",
     "joblib>=0.17.0",
     "fire>=0.3.1",
+    "ruamel.yaml>=0.16.12",
 ]
 
 # Numpy include