diff --git a/project/ble_peripheral/ble_app_bladder_patch/main.c b/project/ble_peripheral/ble_app_bladder_patch/main.c
index e06a402..9976f18 100644
--- a/project/ble_peripheral/ble_app_bladder_patch/main.c
+++ b/project/ble_peripheral/ble_app_bladder_patch/main.c
@@ -635,6 +635,16 @@ static void nus_data_handler(ble_nus_evt_t * p_evt)
             }
         }
 
+#if FEATURE_SECURE_CONNECTION && !BLE_DEV_MODE
+        if (ble_connection_st != BLE_CONNECTED_ST)
+        {
+            return;   /* Not authenticated: do not buffer command */
+        }
+#endif
+
+        cmd_type_t = CMD_BLE;
+        ble_got_new_data = true;
+
         /* Only copy in callback; process in main loop */
         if (p_evt->params.rx_data.length <= BLE_NUS_MAX_DATA_LEN)
         {