diff --git a/requirements.txt b/requirements.txt
index cf7b6e1..7df6917 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ numpy==1.14.5
 opencv-python==3.4.3.18
 ordered-set==3.1
 protobuf==3.6.1
-PyYAML==3.13
+PyYAML==5.4
 scikit-learn==0.19.2
 scipy==1.1.0
 six==1.12.0