diff --git a/marine-js/build.sh b/marine-js/build.sh
index 6f15fa6e..199b7a7c 100755
--- a/marine-js/build.sh
+++ b/marine-js/build.sh
@@ -1,6 +1,6 @@
 #! /bin/bash
 
-wasm-pack build -d marine-js-pkg --target web
+wasm-pack build -d marine-js-pkg --target web --locked
 
 MARINE_JS_JS_DEST=npm-package/src/snippets/marine-js-6faa67b8af9cc173/
 mkdir -p $MARINE_JS_JS_DEST