diff --git a/ckb-light-wasm-demo b/ckb-light-wasm-demo
index a283ded..4bcc2db 160000
--- a/ckb-light-wasm-demo
+++ b/ckb-light-wasm-demo
@@ -1 +1 @@
-Subproject commit a283ded948ec8f5b8bfa6dbdccd295bedd487a29
+Subproject commit 4bcc2dbed41df7112aba0f3a96ad262004dd8658
diff --git a/prepare.sh b/prepare.sh
index a66d717..c5f33a3 100644
--- a/prepare.sh
+++ b/prepare.sh
@@ -2,6 +2,7 @@ mkdir tmp
 cd tmp
 git clone https://github.com/gpBlockchain/startBlockchain.git
 cd startBlockchain
+git checkout fix-panic-of-holding-matched_blocks
 cd ckbLightClient
 sh prepare.sh
 sh start.sh