diff --git a/pyproject.toml b/pyproject.toml
index 85838822..027ee542 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ optional-dependencies.dev = [
     "pylint[spelling]==4.0.5",
     "pyproject-fmt==2.21.1",
     "pyrefly==0.63.0",
-    "pyright==1.1.408",
+    "pyright==1.1.409",
     "pyroma==5.0.1",
     "pytest==9.0.3",
     "pytest-beartype-tests==2026.4.26",