diff --git a/package-lock.json b/package-lock.json
index 06b32aa..3259d41 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -421,9 +421,9 @@
       }
     },
     "acorn": {
-      "version": "6.1.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.1.tgz",
-      "integrity": "sha512-jPTiwtOxaHNaAPg/dmrJ/beuzLRnXtB0kQPQ8JpotKJgTB6rX6c8mlf315941pyjBSaPg8NHXS9fhP4u17DpGA==",
+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+      "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
       "dev": true
     },
     "acorn-dynamic-import": {
diff --git a/package.json b/package.json
index 9cc124b..48aa641 100644
--- a/package.json
+++ b/package.json
@@ -9,7 +9,7 @@
   },
   "main": "main.js",
   "devDependencies": {
-    "acorn": "^6.1.1",
+    "acorn": "^6.4.1",
     "babel-cli": "^6.26.0",
     "babel-core": "^6.26.3",
     "babel-eslint": "^10.0.2",