diff --git a/requirements_dev.txt b/requirements_dev.txt
index 9f44470..3d57554 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -11,7 +11,7 @@ pip==9.0.1
 pytest-cov==2.5.1
 pytest-runner==2.11.1
 pytest==3.1.2
-PyYAML==3.12
+PyYAML==5.2
 Sphinx==1.6.3
 tox==2.7.0
 watchdog==0.8.3