diff --git a/tasks.py b/tasks.py
index 9707cd9..65967d0 100644
--- a/tasks.py
+++ b/tasks.py
@@ -147,7 +147,7 @@ def lint_mypy(context):
                 --disable-error-code=misc
                 --cache-dir=build/mypy
                 --strict
-                --python-version=3.8
+                --python-version=3.9
         """,
     )