diff --git a/requirements_dev.txt b/requirements_dev.txt
index ff23148..0477e15 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==3.12
+PyYAML==3.13
 
 pip==9.0.1
 bumpversion==0.5.3