diff --git a/requirements.txt b/requirements.txt
index b1bb14e..67fdd74 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -69,7 +69,7 @@ python-dotenv==0.10.3
 pytz==2019.2
 pywin32==225
 pywinpty==0.5.5
-PyYAML==5.1.2
+PyYAML==5.4
 pyzmq==18.1.0
 requests==2.22.0
 scipy==1.3.1