diff --git a/requirements.txt b/requirements.txt
index 960334c00..cd8e3ff86 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -90,3 +90,4 @@ configobj==5.0.6
 networkx==1.11
 gcs-oauth2-boto-plugin==1.14
 xmltodict==0.11.0
+pyyaml==3.12
diff --git a/setup.py b/setup.py
index 7c2099104..2d1ef2b83 100644
--- a/setup.py
+++ b/setup.py
@@ -95,6 +95,7 @@ install_requires = [
     'configobj==5.0.6',
     'networkx==1.11',
     'gcs-oauth2-boto-plugin==1.14',
+    'pyyaml==3.12',
 ]
 
 if platform.system() == 'Darwin':