diff --git a/requirements.txt b/requirements.txt
index 6e9e18c..434d83c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ mkl-random==1.0.2
 mkl-service==2.0.2
 numpy==1.16.4
 protobuf==3.8.0
-PyYAML==5.1.2
+PyYAML==5.4
 scipy==1.3.1
 six==1.12.0
 tensorboard==1.14.0