diff --git a/docs/sdk/core/app4.md b/docs/sdk/core/app4.md
index 0724e5e7a8..b6596ef0cf 100644
--- a/docs/sdk/core/app4.md
+++ b/docs/sdk/core/app4.md
@@ -16,7 +16,7 @@ here we will introduce the other ABCI requests sent by Tendermint, and
 how we can use them to build more advanced applications. For a more complete
 depiction of the ABCI and how its used, see
 [the
-specification](https://github.com/tendermint/tendermint/blob/master/docs/abci-spec.md)
+specification](https://github.com/tendermint/tendermint/blob/master/docs/app-dev/abci-spec.md)
 
 ## InitChain