diff --git a/go.mod b/go.mod
index 661fdb1..786b1c3 100644
--- a/go.mod
+++ b/go.mod
@@ -10,7 +10,7 @@ require (
 	github.com/ethereum/go-ethereum v1.12.0
 	github.com/gorilla/mux v1.8.0
 	github.com/grpc-ecosystem/grpc-gateway v1.16.0
-	github.com/hyperledger-labs/yui-relayer v0.4.19
+	github.com/hyperledger-labs/yui-relayer v0.4.21
 	github.com/oasisprotocol/oasis-core/go v0.2201.11
 	github.com/spf13/cobra v1.7.0
 	github.com/spf13/viper v1.16.0
diff --git a/go.sum b/go.sum
index 7ce8702..69ed046 100644
--- a/go.sum
+++ b/go.sum
@@ -715,8 +715,8 @@ github.com/huandu/skiplist v1.2.0 h1:gox56QD77HzSC0w+Ws3MH3iie755GBJU1OER3h5VsYw
 github.com/huandu/skiplist v1.2.0/go.mod h1:7v3iFjLcSAzO4fN5B8dvebvo/qsfumiLiDXMrPiHF9w=
 github.com/hudl/fargo v1.3.0/go.mod h1:y3CKSmjA+wD2gak7sUSXTAoopbhU08POFhmITJgmKTg=
 github.com/hydrogen18/memlistener v0.0.0-20200120041712-dcc25e7acd91/go.mod h1:qEIFzExnS6016fRpRfxrExeVn2gbClQA99gQhnIcdhE=
-github.com/hyperledger-labs/yui-relayer v0.4.19 h1:I139zRG0228bRAyrhEV2Pgdwbv9Fx2vw3azNHhYqnsc=
-github.com/hyperledger-labs/yui-relayer v0.4.19/go.mod h1:Hdc/ERCPDhbipri45/U6+/3kDH7EttIWGdql+Rd3tZg=
+github.com/hyperledger-labs/yui-relayer v0.4.21 h1:37IewA8w5Ffsp6ySOfpLjjfwlQkeK/Mxvlc830NnJmo=
+github.com/hyperledger-labs/yui-relayer v0.4.21/go.mod h1:Hdc/ERCPDhbipri45/U6+/3kDH7EttIWGdql+Rd3tZg=
 github.com/ianlancetaylor/demangle v0.0.0-20181102032728-5e5cf60278f6/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/ianlancetaylor/demangle v0.0.0-20200824232613-28f6c0f3b639/go.mod h1:aSSvb/t6k1mPoxDqO4vJh6VOCGPwU4O0C2/Eqndh1Sc=
 github.com/imkira/go-interpol v1.1.0/go.mod h1:z0h2/2T3XF8kyEPpRgJ3kmNv+C43p+I/CoI+jC3w2iA=
diff --git a/relay/prover.go b/relay/prover.go
index fca3786..611f32e 100644
--- a/relay/prover.go
+++ b/relay/prover.go
@@ -336,3 +336,9 @@ func (pr *Prover) ProveState(ctx core.QueryContext, path string, value []byte) (
 	}
 	return cp, sc.Height, nil
 }
+
+// ProveHostConsensusState returns an existence proof of the consensus state at `height`
+// This proof would be ignored in ibc-go, but it is required to `getSelfConsensusState` of ibc-solidity.
+func (pr *Prover) ProveHostConsensusState(ctx core.QueryContext, height exported.Height, consensusState exported.ConsensusState) (proof []byte, err error) {
+	return pr.originProver.ProveHostConsensusState(ctx, height, consensusState)
+}