diff --git a/pyproject.toml b/pyproject.toml
index 8329594..7501afe 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -57,7 +57,7 @@ dev = [
     "pytest-mock>=3.10",
     "ruff==0.15.21",
     "mypy==2.1.0",
-    "basedpyright==1.39.8",
+    "basedpyright==1.39.9",
     "vulture==2.16",
     "pytest-cov==7.1.0",
     "check-manifest==0.51",