diff --git a/requirements.txt b/requirements.txt
index 6543a4d..c9a1b9d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -41,7 +41,7 @@ Pygments==2.2.0
 pyparsing==2.2.0
 python-dateutil==2.6.1
 pytz==2014.7
-PyYAML==3.12
+PyYAML==5.1
 gunicorn==19.7.1
 requests==2.18.4
 scikit-learn==0.19.1