diff --git a/pyproject.toml b/pyproject.toml
index 01711eed5..40f4a8470 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -64,7 +64,7 @@ optional-dependencies.ryaml = [
   "ryaml>=0.5.1",
 ]
 optional-dependencies.validation = [
-  "openapi-spec-validator>=0.2.8,<0.8",
+  "openapi-spec-validator>=0.2.8,<0.9",
   "prance>=0.18.2",
 ]
 optional-dependencies.watch = [