diff --git a/pyproject.toml b/pyproject.toml
index f5a4a96f..26443a6c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,7 +38,7 @@ dependencies = [
 ]
 optional-dependencies.dev = [
     "actionlint-py==1.7.8.24",
-    "check-manifest==0.50",
+    "check-manifest==0.51",
     "deptry==0.23.1",
     "doc8==2.0.0",
     "doccmd==2025.9.19",