diff --git a/docs/en/unit/rfid.md b/docs/en/unit/rfid.md
index a47298c1..8908fa74 100644
--- a/docs/en/unit/rfid.md
+++ b/docs/en/unit/rfid.md
@@ -70,7 +70,7 @@ After programming the RFID.ino, the IC card or the mobile phone NFC, close to th
 
 To get complete code, please click [here](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/Unit/RFID/UIFlow)
 
-After opening and burning this example using [UIFlow](flow.m5stack.com), place the proximity card on the Unit surface and the screen displays “True” and the UID number of the card.
+After opening and burning this example using [UIFlow](http://flow.m5stack.com), place the proximity card on the Unit surface and the screen displays “True” and the UID number of the card.
 
 <img src="assets/img/product_pics/unit/unit_example/RFID/example_unit_rfid_02.png">
 
diff --git a/docs/zh_CN/unit/rfid.md b/docs/zh_CN/unit/rfid.md
index 84cde99d..c8ab2674 100644
--- a/docs/zh_CN/unit/rfid.md
+++ b/docs/zh_CN/unit/rfid.md
@@ -64,7 +64,7 @@
 
 [请点击此处下载UIFlow](https://github.com/m5stack/M5-ProductExampleCodes/tree/master/Unit/RFID/UIFlow)
 
-使用[UIFlow](flow.m5stack.com)下载该案例程序到M5Core中后将感应卡放置在 RFID Unit 上.M5Core屏幕将显示打印其对应的ID信息.
+使用[UIFlow](http://flow.m5stack.com)下载该案例程序到M5Core中后将感应卡放置在 RFID Unit 上.M5Core屏幕将显示打印其对应的ID信息.
 
 <img src="assets/img/product_pics/unit/unit_example/RFID/example_unit_rfid_02.png">