diff --git a/go.mod b/go.mod
index dca678f9..ad5cfbc6 100644
--- a/go.mod
+++ b/go.mod
@@ -2,6 +2,8 @@ module github.com/hyperledger-labs/yui-relayer
 
 go 1.21
 
+replace github.com/datachainlab/ibc-mock-client => github.com/siburu/ibc-mock-client v0.0.0-20240408195355-ebb8a91efb68
+
 require (
 	cosmossdk.io/errors v1.0.1
 	cosmossdk.io/math v1.3.0
diff --git a/go.sum b/go.sum
index 2f69f9f9..65a4aca9 100644
--- a/go.sum
+++ b/go.sum
@@ -379,8 +379,6 @@ github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7Do
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/danieljoos/wincred v1.1.2 h1:QLdCxFs1/Yl4zduvBdcHB8goaYk9RARS2SgLLRuAyr0=
 github.com/danieljoos/wincred v1.1.2/go.mod h1:GijpziifJoIBfYh+S7BbkdUTU4LfM+QnGqR5Vl2tAx0=
-github.com/datachainlab/ibc-mock-client v0.3.4 h1:66OecN0qdsTm92MWAZGZTBYA2DiJdjRE85MTTlLqtHg=
-github.com/datachainlab/ibc-mock-client v0.3.4/go.mod h1:+WXl7RLwjigJvsqxabHCqSp+qxBjTwkNV9KPHJndGhA=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
@@ -948,6 +946,8 @@ github.com/sasha-s/go-deadlock v0.3.1 h1:sqv7fDNShgjcaxkO0JNcOAlr8B9+cV5Ey/OB71e
 github.com/sasha-s/go-deadlock v0.3.1/go.mod h1:F73l+cr82YSh10GxyRI6qZiCgK64VaZjwesgfQ1/iLM=
 github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg65j358z/aeFdxmN0P9QXhEzd20vsDc=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
+github.com/siburu/ibc-mock-client v0.0.0-20240408195355-ebb8a91efb68 h1:6/v0gnQI+Z7JhoY4qP2ZEHClGTwtA0xKwd1Nv2H0E9E=
+github.com/siburu/ibc-mock-client v0.0.0-20240408195355-ebb8a91efb68/go.mod h1:2wGddiF2uHFhiMBpSskzKT/wA8naXi5DLoXt1KEZA1o=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
 github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
 github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=