diff --git a/src/main.rs b/src/main.rs
index 92cb136..c16763b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -70,7 +70,7 @@ fn main() {
     init_logger();
 
     let keep_running_config = Arc::new(keep_running_config);
-    for check_cnt in 0.. {
+    for check_cnt in 0_u64.. {
         info!("Check index: {} @{:?}", check_cnt, Local::now());
         keep_runningd(keep_running_config.clone());
         thread::sleep(Duration::from_secs(keep_running_config.get_check_inverval_secs()));