diff --git a/requirements.txt b/requirements.txt
index 361c2c4..a9a89bb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ protobuf==3.8.0
 pydot==1.4.1
 pyparsing==2.4.2
 pyreadline==2.1
-PyYAML==5.1.2
+PyYAML==5.4
 scipy==1.3.1
 setuptools==41.0.1
 six==1.12.0