diff --git a/conf/templates/pyproject.toml b/conf/templates/pyproject.toml
index 0500ebb4..790626e6 100644
--- a/conf/templates/pyproject.toml
+++ b/conf/templates/pyproject.toml
@@ -12,6 +12,8 @@
 
   warn_unreachable = true
 
+  disallow_untyped_calls = true
+
   enable_error_code = [
     "explicit-override",
     "ignore-without-code",