diff --git a/requirements.txt b/requirements.txt
index ad00114..a45f310 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ opencv-python==3.4.0.12
 Pillow==6.2.0
 protobuf==3.5.1
 pytz==2018.3
-PyYAML==5.1
+PyYAML==5.4
 pyzbar==0.1.4
 scipy==1.0.0
 six==1.11.0