diff --git a/package-lock.json b/package-lock.json
index 3faf5ab..4674344 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -188,9 +188,9 @@
       }
     },
     "acorn": {
-      "version": "6.0.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.0.1.tgz",
-      "integrity": "sha1-ZuYUfhAncER53G2bINiExXLbPME=",
+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+      "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
       "dev": true
     },
     "acorn-jsx": {
diff --git a/package.json b/package.json
index ecb896d..3964a45 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "shift-regexp-acceptor": "2.0.3"
   },
   "devDependencies": {
-    "acorn": "6.0.1",
+    "acorn": "6.4.1",
     "angular": "1.7.4",
     "babel-cli": "6.26.0",
     "babel-core": "6.26.3",