diff --git a/conf/templates/pyproject.toml b/conf/templates/pyproject.toml
index 790626e6..0cd002f4 100644
--- a/conf/templates/pyproject.toml
+++ b/conf/templates/pyproject.toml
@@ -14,6 +14,8 @@
 
   disallow_untyped_calls = true
 
+  warn_return_any = true
+
   enable_error_code = [
     "explicit-override",
     "ignore-without-code",