diff --git a/pyproject.toml b/pyproject.toml
index 61538f9..e38d91e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -83,9 +83,13 @@ source = [
 show_missing = true
 
 [tool.mypy]
+enable_error_code = [
+  "ignore-without-code",
+  "redundant-expr",
+  "truthy-bool",
+]
 mypy_path = "src/"
 namespace_packages = false
-show_error_codes = true
 strict = true
 warn_unreachable = true