diff --git a/babel.config.js b/babel.config.js
index fb3ade8..0673180 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -3,4 +3,5 @@ module.exports = {
   presets: [
     '@babel/preset-env'
   ],
+  plugins: ["@babel/plugin-transform-class-properties"]
 };
diff --git a/package.json b/package.json
index 65911db..ccb431b 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,7 @@
   "devDependencies": {
     "@babel/core": "^7.12.10",
     "@babel/preset-env": "^7.12.11",
+    "@babel/plugin-transform-class-properties": "^7.18.6",
     "@rollup/plugin-babel": "^6.0.0",
     "@rollup/plugin-node-resolve": "^15.0.0",
     "@rollup/plugin-terser": "^0.4.4",