diff --git a/src/saveweb_tracker/tracker_task.go b/src/saveweb_tracker/tracker_task.go
index 3d92cac..dd4ae3c 100644
--- a/src/saveweb_tracker/tracker_task.go
+++ b/src/saveweb_tracker/tracker_task.go
@@ -54,7 +54,7 @@ var (
 func (t *Tracker) ClaimTask(with_delay bool) *Task {
 	if with_delay {
 		t._claim_wait_lock.Lock()
-		time.Sleep(time.Duration(t.Project().Client.ClaimTaskDelay) * time.Second)
+		time.Sleep(time.Duration(t.Project().Client.ClaimTaskDelay * float64(time.Second)))
 		t._claim_wait_lock.Unlock()
 	}
 	resp, err := t.HTTP_client.Post(t.API_BASE+t.API_VERSION+"/project/"+t.project_id+"/"+t.client_version+"/"+t.archivist+"/claim_task", "", nil)