diff --git a/requirements.txt b/requirements.txt
index bee7d70..de6b9ae 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ ptyprocess==0.6.0
 pyparsing==2.2.0
 python-dateutil==2.7.3
 pytz==2018.5
-PyYAML==3.13
+PyYAML==5.1
 scipy==1.1.0
 simplegeneric==0.8.1
 six==1.11.0