diff --git a/rel/files/emqttd.config.production b/rel/files/emqttd.config.production
index f34e2f9d6..c44e1354c 100644
--- a/rel/files/emqttd.config.production
+++ b/rel/files/emqttd.config.production
@@ -86,7 +86,7 @@
             {max_inflight, 100},
 
             %% Retry interval for redelivering QoS1/2 messages.
-            {unack_retry_interval, 30},
+            {unack_retry_interval, 60},
 
             %% Awaiting PUBREL Timeout
             {await_rel_timeout, 20},