diff --git a/requirements_dev.txt b/requirements_dev.txt
index 8b5fe9d..07dfb27 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -7,7 +7,7 @@ tox==3.14.2
 coverage==4.5.4
 Sphinx==2.2.2
 cryptography==2.8
-PyYAML==5.1.2
+PyYAML==5.2
 pytest==5.3.1
 pytest-runner==5.2
 vcrpy==2.1.1