diff --git a/devel/run_mypy.py b/devel/run_mypy.py
index 568666b..14524e1 100755
--- a/devel/run_mypy.py
+++ b/devel/run_mypy.py
@@ -15,6 +15,7 @@
 
 exclude = """
 lib/mypy_dummy.py
+devel/lister.py
 main/migrations/
 """.split() # type: List[str]