diff --git a/runtime/src/lib.rs b/runtime/src/lib.rs
index bfc4b4b..5fc1802 100644
--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -102,7 +102,7 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 	spec_name: create_runtime_str!("uart"),
 	impl_name: create_runtime_str!("uart"),
 	authoring_version: 1,
-	spec_version: 23,
+	spec_version: 24,
 	impl_version: 1,
 	apis: RUNTIME_API_VERSIONS,
 	transaction_version: 1,