diff --git a/dev_requirements.txt b/dev_requirements.txt
index a89611f..f68aa90 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -1,4 +1,4 @@
 nose==1.3.0
 mock==1.0.1
-PyYAML==3.11
+PyYAML==5.1
 moto==0.3.1