diff --git a/pyproject.toml b/pyproject.toml
index 8b63677..0a9772a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -13,7 +13,7 @@ dependencies = []
 
 [project.optional-dependencies]
 dev = [
-    "check-jsonschema>=0.37,<1",
+    "check-jsonschema>=0.37.3,<1",
     "mypy>=1.16,<2",
     "pre-commit>=4,<5",
     "pytest-cov>=5,<7",