diff --git a/requirements.txt b/requirements.txt
index 4b91e83..c2f569a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -32,7 +32,7 @@ pylint==2.3.1
 pyparsing==2.4.0
 pytest==5.0.1
 python-dateutil==2.8.0
-PyYAML==5.1
+PyYAML==5.4
 scipy==1.3.0
 six==1.12.0
 toml==0.10.0