diff --git a/src/api.md b/src/api.md
index b8d96f9..6e6a6b4 100644
--- a/src/api.md
+++ b/src/api.md
@@ -8,4 +8,4 @@ Any missing parameter, or parameter with an invalid format, should result in a J
 
 - "hexadecimal-encoded" designates a binary value encoded as hexadecimal. The value must either be empty, or start with `"0x"` and contain an even number of characters.
 - "SCALE-encoded" designates a value encoded using [the SCALE codec](https://docs.substrate.io/v3/advanced/scale-codec/).
-- "Merkle value" as decribed in the [Polkadot spec](https://spec.polkadot.network/chap-state#defn-merkle-value).
+- "Merkle value" is described in the [Polkadot specification](https://spec.polkadot.network/chap-state#defn-merkle-value).