diff --git a/mypy.ini b/mypy.ini
index 296657f7c197198c9f0c873b8233334b0f573986..96d343aae572f25df10add36ac376bf1997c9c15 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -1,5 +1,6 @@
 [mypy]
-python_version=3.10
+python_version = 3.10
+exclude = "src/pystencils/old"
 
 [mypy-pymbolic.*]
 ignore_missing_imports=true