diff --git a/proto/runner/v1/messages.proto b/proto/runner/v1/messages.proto
index 33eba6d..a41a45f 100644
--- a/proto/runner/v1/messages.proto
+++ b/proto/runner/v1/messages.proto
@@ -27,10 +27,13 @@ message DeclareResponse {
   Runner runner = 1;
 }
 
-message FetchTaskRequest {}
+message FetchTaskRequest {
+  int64 tasks_version = 1; // Runner use `tasks_version` to compare with Gitea and detemine whether new tasks may exist.
+}
 
 message FetchTaskResponse {
   Task task = 1;
+  int64 tasks_version = 2; // Gitea informs the Runner of the latest version of tasks through `tasks_version`.
 }
 
 message UpdateTaskRequest {