diff --git a/package-lock.json b/package-lock.json
index 7c42c95..e3e0ebf 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -215,9 +215,9 @@
             }
         },
         "acorn": {
-            "version": "6.2.1",
-            "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.2.1.tgz",
-            "integrity": "sha512-JD0xT5FCRDNyjDda3Lrg/IxFscp9q4tiYtxE1/nOzlKCk7hIRuYjhq1kCNkbPjMRMZuFq20HNQn1I9k8Oj0E+Q=="
+            "version": "6.4.1",
+            "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+            "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA=="
         },
         "ansi-styles": {
             "version": "3.2.1",