diff --git a/package-lock.json b/package-lock.json
index e97ef07..7bc6a40 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -799,9 +799,9 @@
       "dev": true
     },
     "acorn": {
-      "version": "6.3.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
-      "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA=="
+      "version": "6.4.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+      "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA=="
     },
     "acorn-globals": {
       "version": "4.3.3",
diff --git a/package.json b/package.json
index dd0b96f..c7dacda 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
     "typescript": "^3.5.3"
   },
   "dependencies": {
-    "acorn": "^6.2.1",
+    "acorn": "^6.4.1",
     "acorn-loose": "^6.1.0",
     "chalk": "^2.4.2",
     "console-log-level": "^1.4.1",