diff --git a/Library/PTPusherAPI.m b/Library/PTPusherAPI.m
index 9931f85d..f150b62a 100644
--- a/Library/PTPusherAPI.m
+++ b/Library/PTPusherAPI.m
@@ -42,7 +42,7 @@ - (void)triggerEvent:(NSString *)eventName onChannel:(NSString *)channelName dat
   
   queryParameters[@"body_md5"] = [[bodyString MD5Hash] lowercaseString];
   queryParameters[@"auth_key"] = key;
-  queryParameters[@"auth_timestamp"] = @((double)time(NULL));
+  queryParameters[@"auth_timestamp"] = @([[NSDate date] timeIntervalSince1970]);
   queryParameters[@"auth_version"] = @"1.0";
   queryParameters[@"name"] = eventName;