diff --git a/dev-requirements.txt b/dev-requirements.txt
index 616fc1243..869f39365 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -1,7 +1,7 @@
 # We use dev-requirements.txt instead of just declaring the requirements in
 # the setup function because Read The Docs needs a requirements file.
 black==20.8b1
-PyYAML==5.3.1
+PyYAML==5.4.1
 Pygments==2.7.2
 Sphinx-Substitution-Extensions==2020.9.30.0
 Sphinx==3.2.1