diff --git a/pages/en/developer/assemblyscript-api.mdx b/pages/en/developer/assemblyscript-api.mdx
index e11d0c3fa32b..a818dfff1855 100644
--- a/pages/en/developer/assemblyscript-api.mdx
+++ b/pages/en/developer/assemblyscript-api.mdx
@@ -684,6 +684,7 @@ When the type of a value is certain, it can be converted to a [built-in type](#b
 | JSON                 | Array                | s.toArray()                  |
 | JSON                 | Object               | s.toObject()                 |
 | String               | Address              | Address.fromString(s)        |
+| String               | BigInt               | BigInt.fromString(s)        |
 | String               | BigDecimal           | BigDecimal.fromString(s)     |
 | String (hexadecimal) | Bytes                | ByteArray.fromHexString(s)   |
 | String (UTF-8)       | Bytes                | ByteArray.fromUTF8(s)        |