diff --git a/docs/en/hat/hat-env.md b/docs/en/hat/hat-env.md
index d5f8a79b..c99d6c83 100644
--- a/docs/en/hat/hat-env.md
+++ b/docs/en/hat/hat-env.md
@@ -52,7 +52,7 @@
 
 <table>
  <tr><td>M5StickC</td><td>GPIO0</td><td>GPIO26</td><td>5V</td><td>GND</td></tr>
- <tr><td>HAT ENV</td><td>SDA</td><td>SCL</td><td>5V</td><td>GND</td></tr>
+ <tr><td>HAT ENV</td><td>SDA</td><td>SCL</td><td>3.3V</td><td>GND</td></tr>
 </table>
 
 ## EasyLoader