tmux-python
diff --git a/‎poetry.lock
+71-33 b/‎poetry.lock
+71-33
diff --git a/‎pyproject.toml
+4-1 b/‎pyproject.toml
+4-1
@@ -83,7 +83,10 @@ black = "*"
 isort = "*"
 
 ### Lint ###
-flake8 = "*"
+flake8 = [
+  { version = "*", python = "^3.7" },
+  { version = ">=5", python = "^3.8" },
+]
 flake8-bugbear = "*"
 flake8-comprehensions = "*"
 mypy = "*"