diff --git a/requirements_dev.txt b/requirements_dev.txt
index c7984aa..7a5952b 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -8,7 +8,7 @@ opencv-python==3.3.0.9
 pillow==4.2.1
 pymodbus==1.3.2
 pyserial==3.4
-PyYAML==4.2b1
+PyYAML==5.4.1
 
 pip==9.0.1
 bumpversion==0.5.3