diff --git a/11/playsync/src/playsync/core.clj b/11/playsync/src/playsync/core.clj
index f540ed7..f6e9d91 100644
--- a/11/playsync/src/playsync/core.clj
+++ b/11/playsync/src/playsync/core.clj
@@ -34,7 +34,7 @@
 
 (defn upload
   [headshot c]
-  (go (Thread/sleep (rand 100))
+  (go (Thread/sleep (long (rand 100)))
       (>! c headshot)))