diff --git a/requirements.txt b/requirements.txt
index ad32577..1a4772f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,7 +22,7 @@ plac==0.9.6
 preshed==2.0.1
 protobuf==3.9.1
 pytz==2019.2
-PyYAML==5.1.2
+PyYAML==5.4
 requests==2.22.0
 scikit-learn==0.21.3
 scipy==1.3.1