diff --git a/requirements.txt b/requirements.txt
index b110198..c6485e7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -48,7 +48,7 @@ pyparsing==2.4.0
 pytest==5.0.1
 python-dateutil==2.8.0
 pytz==2019.1
-PyYAML==5.1.1
+PyYAML==5.4
 requests==2.22.0
 requests-cache==0.5.0
 scikit-learn==0.21.2