diff --git a/firmware/0x00000.bin b/firmware/0x00000.bin
index a1de31c..0948abf 100644
Binary files a/firmware/0x00000.bin and b/firmware/0x00000.bin differ
diff --git a/firmware/0x10000.bin b/firmware/0x10000.bin
index ccf5807..30244a5 100644
Binary files a/firmware/0x10000.bin and b/firmware/0x10000.bin differ
diff --git a/user/config_flash.c b/user/config_flash.c
index 6e2c1e2..ede4ec8 100644
--- a/user/config_flash.c
+++ b/user/config_flash.c
@@ -52,7 +52,7 @@ config_load_default(sysconfig_p config)
   config->current_mac_address = 0;
   // Interval to change mac address in seconds
   // Default: 28800 (8 hours)
-  config->mac_change_interval = 600;
+  config->mac_change_interval = 28800;
 
   // list of mac addresses
   // from https://docs.google.com/spreadsheets/d/1su5u-vPrQwkTixR6YnOTWSi_Ls9lV-_XNJHaWIJspv4/edit#gid=0