diff --git a/requirements-dev.txt b/requirements-dev.txt
index a5ab9b3c..5c518fc2 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -20,7 +20,7 @@ mergedeep==1.3.4; python_version >= '3.6'
 mkdocs-material-extensions==1.1; python_version >= '3.5'
 mkdocs-material==7.1.8
 mkdocs==1.2.1
-packaging==20.9; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
+packaging==21.3; python_version >= '2.7' and python_version not in '3.0, 3.1, 3.2, 3.3'
 prompt-toolkit==3.0.18
 pygments==2.9.0
 pymdown-extensions==8.2; python_version >= '3.6'