diff --git a/bigchaindb/common/schema/README.md b/bigchaindb/common/schema/README.md
index ab8d8e9d..1de4bd41 100644
--- a/bigchaindb/common/schema/README.md
+++ b/bigchaindb/common/schema/README.md
@@ -13,9 +13,9 @@ The aim is to provide:
 ## Sources
 
 The files defining the JSON Schema for transactions (`transaction_*.yaml`)
-are based on the [IPDB Transaction Spec](https://github.com/ipdb/ipdb-tx-spec).
+are based on the [BigchainDB Transactions Specs](https://github.com/bigchaindb/BEPs/tree/master/tx-specs).
 If you want to add a new transaction version,
-you must add it to the IPDB Transaction Spec first.
+you must write a spec for it first.
 (You can't change the JSON Schema files for old versions.
 Those were used to validate old transactions
 and are needed to re-check those transactions.)