diff --git a/setup.py b/setup.py
index 9e48162e..ebf95d83 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@
 
 
 INSTALL_REQUIRES = (
-    ['pycodestyle >= 2.10.0', 'tomli; python_version < "3.11"']
+    ['packaging', 'pycodestyle >= 2.10.0', 'tomli; python_version < "3.11"']
 )