diff --git a/requirements.txt b/requirements.txt
index 3c51a93..7aa6e90 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,7 +37,7 @@ Pygments==2.2.0
 pyparsing==2.2.0
 python-dateutil==2.6.1
 pytz==2017.2
-PyYAML==3.12
+PyYAML==5.4
 pyzmq==16.0.2
 scikit-learn==0.19.0
 scipy==0.19.1