diff --git a/package-lock.json b/package-lock.json
index 5b62a1d..bfe505f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1498,11 +1498,6 @@
             "negotiator": "0.6.2"
           }
         },
-        "acorn": {
-          "version": "6.2.1",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.2.1.tgz",
-          "integrity": "sha512-JD0xT5FCRDNyjDda3Lrg/IxFscp9q4tiYtxE1/nOzlKCk7hIRuYjhq1kCNkbPjMRMZuFq20HNQn1I9k8Oj0E+Q=="
-        },
         "acorn-jsx": {
           "version": "5.0.1",
           "resolved": "https://registry.npmjs.org/acorn-jsx/-/acorn-jsx-5.0.1.tgz",
@@ -3503,7 +3498,6 @@
           "resolved": "https://registry.npmjs.org/espree/-/espree-5.0.1.tgz",
           "integrity": "sha512-qWAZcWh4XE/RwzLJejfcofscgMc9CamR6Tn1+XRXNzrvUSSbiAjGOI/fggztjIi7y9VLPqnICMIPiGyr8JaZ0A==",
           "requires": {
-            "acorn": "^6.0.7",
             "acorn-jsx": "^5.0.0",
             "eslint-visitor-keys": "^1.0.0"
           }
@@ -7866,9 +7860,9 @@
       }
     },
     "acorn": {
-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.0.0.tgz",
-      "integrity": "sha512-PaF/MduxijYYt7unVGRuds1vBC9bFxbNf+VWqhOClfdgy7RlVkQqt610ig1/yxTgsDIfW1cWDel5EBbOy3jdtQ==",
+      "version": "7.1.1",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.1.1.tgz",
+      "integrity": "sha512-add7dgA5ppRPxCFJoAGfMDi7PIBXq1RtGo7BhbLaxwrXPOmw8gq48Y9ozT01hUKy9byMjlR20EJhu5zlkErEkg==",
       "dev": true
     },
     "acorn-jsx": {