diff --git a/index.js b/index.js
index 7724c97..b887946 100644
--- a/index.js
+++ b/index.js
@@ -8,7 +8,8 @@ module.exports = isExpression;
 var DEFAULT_OPTIONS = {
   throw: false,
   strict: false,
-  lineComment: false
+  lineComment: false,
+  ecmaVersion: 'latest'
 };
 
 function isExpression(src, options) {
diff --git a/package.json b/package.json
index fbad8eb..e73e975 100644
--- a/package.json
+++ b/package.json
@@ -10,7 +10,7 @@
     "expression"
   ],
   "dependencies": {
-    "acorn": "^7.1.1",
+    "acorn": "^8.8.2",
     "object-assign": "^4.1.1"
   },
   "devDependencies": {