diff --git a/requirements_dev.txt b/requirements_dev.txt
index 35e787d..afecf62 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -8,7 +8,7 @@ mock==4.0.1
 pip==20.0.2
 plumbum==1.6.8
 pytest==5.3.5
-PyYAML==5.3
+PyYAML==5.4
 Sphinx==2.4.1
 tox==3.14.3
 wheel==0.34.2