diff --git a/pyproject.toml b/pyproject.toml
index d9f5c44..6e24799 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -104,7 +104,7 @@ warn_redundant_casts = true
 warn_unreachable = true
 warn_unused_configs = true
 warn_unused_ignores = true
-exclude = "^build/|^docs/"
+exclude = "^build/|^docs/|^tianshou/utils/(string|logging).py"
 
 [tool.doc8]
 max-line-length = 1000