diff --git a/setup.py b/setup.py
index 37eb78ccf..51e1748f5 100644
--- a/setup.py
+++ b/setup.py
@@ -11,6 +11,7 @@ install_requires = [
     "dicttoxml",
     "six",
     "werkzeug",
+    "pyaml",
     "pytz",
     "python-dateutil",
 ]