diff --git a/requirements/dev.txt b/requirements/dev.txt
index 182a70a..6c0f297 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -9,4 +9,4 @@ tox==2.9.1
 coverage==4.5.1
 Sphinx==1.7.0
 cryptography==2.1.4
-PyYAML==3.12
+PyYAML==6.0.2