diff --git a/hub/hub.go b/hub/hub.go
index ab4a3cf..92b1dba 100644
--- a/hub/hub.go
+++ b/hub/hub.go
@@ -54,9 +54,7 @@ func (h *Hub) Sub(s *Subscription) {
 		}
 	}
 
-	h.lock.Lock()
 	h.subscribers = append(h.subscribers, s)
-	h.lock.Unlock()
 }
 
 func (h *Hub) Info() map[string]map[string]uint {