diff --git a/pyproject.toml b/pyproject.toml
index c5ef987..6609e7a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -73,6 +73,11 @@ source = [
 show_missing = true
 
 [tool.mypy]
+enable_error_code = [
+  "ignore-without-code",
+  "redundant-expr",
+  "truthy-bool",
+]
 check_untyped_defs = true
 disallow_any_generics = true
 disallow_incomplete_defs = true
@@ -80,7 +85,6 @@ disallow_untyped_defs = true
 mypy_path = "src/"
 namespace_packages = false
 no_implicit_optional = true
-show_error_codes = true
 warn_unreachable = true
 warn_unused_ignores = true