diff --git a/requirements_dev.txt b/requirements_dev.txt
index 4058952..ba85bcf 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -7,5 +7,5 @@ tox==3.14.3
 coverage==5.0.3
 Sphinx==2.3.1
 cryptography==3.2
-PyYAML==5.3
+PyYAML==5.4