diff --git a/requirements_dev.txt b/requirements_dev.txt
index 9ffa36a..0b6d3cf 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -7,7 +7,7 @@ tox==3.21.1
 coverage==5.3.1
 Sphinx==3.4.3
 cryptography==3.3.1
-PyYAML==5.3.1
+PyYAML==5.4.1
 pytest==6.2.1
 pytest-runner==5.2
 vcrpy==2.1.1