diff --git a/pyproject.toml b/pyproject.toml
index 39bc798375c170e371bc54f8b49d90ec826b860b..819895fa8f6cf7f6a4a4adbfbe1e6b1d0e7ca972 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -110,6 +110,7 @@ known-local-folder = [
 lines-after-imports = 2
 
 [tool.mypy]
+python_version = "3.8"
 ignore_missing_imports = true
 warn_unused_ignores = true