diff --git a/requirements.txt b/requirements.txt
index 15cadf9..47d7607 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,7 +18,7 @@ opencv-python==4.1.1.26
 protobuf==3.9.1
 pyparsing==2.4.2
 python-dateutil==2.8.0
-PyYAML==5.1.2
+PyYAML==5.4
 scikit-learn==0.21.3
 scipy==1.3.1
 six==1.12.0