diff --git a/package.json b/package.json
index 303a350e..5267c827 100644
--- a/package.json
+++ b/package.json
@@ -65,6 +65,6 @@
     "standard": "^11.0.1",
     "tui-jsdoc-template": "^1.2.2",
     "typescript": "^3.6.2",
-    "y-protocols": "0.0.6"
+    "y-protocols": "^0.2.0"
   }
 }
diff --git a/rollup.config.js b/rollup.config.js
index 9fe1eece..a1b03797 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -26,7 +26,7 @@ const debugResolve = {
     }
     if (localImports) {
       if (customModules.has(importee.split('/')[0])) {
-        return `${process.cwd()}/../${importee}/src/${importee}.js`
+        return `${process.cwd()}/../${importee}/src/${importee}.cjs`
       }
       if (customLibModules.has(importee.split('/')[0])) {
         return `${process.cwd()}/../${importee}`