diff --git a/pyproject.toml b/pyproject.toml
index cf7687f..c354581 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -36,7 +36,7 @@ docs = [
     "sphinx-autodoc-typehints>=1.12",
 ]
 mypy = ["mypy==2.1.0"]
-pyright = ["basedpyright==1.39.3"]
+pyright = ["basedpyright==1.39.4"]
 ruff = ["ruff==0.15.12"]
 tests = [
     "coverage>=7.6.12",