diff --git a/requirements.txt b/requirements.txt
index 41fe2fd..064503e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ opencv-python==4.1.0.25
 protobuf==3.8.0
 pyparsing==2.4.0
 python-dateutil==2.8.0
-PyYAML==5.1.1
+PyYAML==5.4
 scikit-learn==0.21.2
 scipy==1.3.0
 six==1.12.0