diff --git a/sonoff/_changelog.ino b/sonoff/_changelog.ino
index 22b29098b..4de80cebe 100644
--- a/sonoff/_changelog.ino
+++ b/sonoff/_changelog.ino
@@ -1,6 +1,7 @@
 /*********************************************************************************************\
  * 6.6.0.10 20190905
  * Redesign Tuya support by Shantur Rathore (#6353)
+ * Add command Reset 99 to reset bootcount to zero (#684, #6351)
  *
  * 6.6.0.9 20190828
  * Change theoretical baudrate range to 300..19660500 bps in 300 increments (#6294)
diff --git a/sonoff/support_command.ino b/sonoff/support_command.ino
index 41b4cfe1d..a1bedea89 100644
--- a/sonoff/support_command.ino
+++ b/sonoff/support_command.ino
@@ -1269,6 +1269,10 @@ void CmndReset(void)
     restart_flag = 210 + XdrvMailbox.payload;
     Response_P(PSTR("{\"" D_CMND_RESET "\":\"" D_JSON_ERASE ", " D_JSON_RESET_AND_RESTARTING "\"}"));
     break;
+  case 99:
+    Settings.bootcount = 0;
+    ResponseCmndDone();
+    break;
   default:
     ResponseCmndChar(D_JSON_ONE_TO_RESET);
   }