diff --git a/README.md b/README.md
index da94f40..1f2b3b4 100644
--- a/README.md
+++ b/README.md
@@ -8,3 +8,5 @@ npm install
 sh prepare.sh
 npm run test
 ```
+
+
diff --git a/prepare.sh b/prepare.sh
index fbcdbb2..edfdaf5 100644
--- a/prepare.sh
+++ b/prepare.sh
@@ -1,6 +1,9 @@
 mkdir tmp
 cd tmp
 git clone https://github.com/gpBlockchain/startBlockchain.git
+cd startBlockchain
+git checkout lgith-client-wasm
+cd ../
 cd startBlockchain/ckbLightClient
 sh prepare.sh
 sh start.sh