diff --git a/docs/asset-implementation.md b/docs/asset-implementation.md
index f165e51..f8dc7b4 100644
--- a/docs/asset-implementation.md
+++ b/docs/asset-implementation.md
@@ -15,7 +15,7 @@ The basis of the M2M mechanism are the following:
 an user account, etc.
 
 Each request performed by `asset-api` to `identity-api` is signed using the pubkey pair, which allows the `identity-api` to verify
-that the requester is the `asset-api` using the retrieved public key. (Implementation: [$/identity-api/src/m2m.js](../identity-api/src/m2m.js))
+that the requester is the `asset-api` using the retrieved public key. (Implementation: [$/identity-api/src/m2m.ts](../identity-api/src/m2m.ts))
 
 The request body is signed in a PGP-like manner, this can be seen by accessing the index page of the `asset-api`
 ([http://localhost:3001/](http://localhost:3001/) in default local environments).