diff --git a/tox.ini b/tox.ini
index c9f1b5d..05b6f9f 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,7 +33,7 @@ deps = behave
 
 [testenv:flake8]
 commands = flake8 pgmigrate.py setup.py
-deps = flake8
+deps = flake8==5.0.4
        flake8-string-format
        flake8-isort==5.0.0
        flake8-commas