diff --git a/docs/en/unit/envII.md b/docs/en/unit/envII.md
index 29ec4ee4..020d33b4 100644
--- a/docs/en/unit/envII.md
+++ b/docs/en/unit/envII.md
@@ -192,7 +192,7 @@
 
   - **[BMP280 Datasheet](https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/datasheet/hat/BMP280-DS001-11_en.pdf)**
 
-  - **[SHT30 Datasheet](https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/datasheet/hat/DHT12_en.pdf)**
+  - **[SHT30 Datasheet](https://m5stack.oss-cn-shenzhen.aliyuncs.com/resource/docs/datasheet/unit/SHT3x_Datasheet_digital.pdf)**
 
 ## Schematic
 
@@ -221,4 +221,4 @@ If you want the complete code, please click [here](https://github.com/m5stack/M5
    anchor_search(purchase_link);
    scrollFunc();
 
-</script>
\ No newline at end of file
+</script>