diff --git a/docs/architecture/adr-017-historical-header-module.md b/docs/architecture/adr-017-historical-header-module.md
index 0077ebb72a..f0cdf4c07d 100644
--- a/docs/architecture/adr-017-historical-header-module.md
+++ b/docs/architecture/adr-017-historical-header-module.md
@@ -58,4 +58,4 @@ Implementation of this ADR will require changes to the Cosmos SDK. It will not r
 
 ## References
 
-- [ICS 2: "Consensus state introspection"](https://github.com/cosmos/ics/tree/master/spec/ics-024-host-requirements#consensus-state-introspection)
+- [ICS 2: "Consensus state introspection"](https://github.com/cosmos/ibc/tree/master/spec/core/ics-002-client-semantics#consensus-state-introspection)