diff --git a/package-lock.json b/package-lock.json
index d1929a1..ac33cb9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -43,9 +43,9 @@
             "dev": true
         },
         "acorn": {
-            "version": "5.7.3",
-            "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.3.tgz",
-            "integrity": "sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw==",
+            "version": "6.4.1",
+            "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+            "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
             "dev": true
         },
         "acorn-globals": {
@@ -56,14 +56,6 @@
             "requires": {
                 "acorn": "^6.0.1",
                 "acorn-walk": "^6.0.1"
-            },
-            "dependencies": {
-                "acorn": {
-                    "version": "6.0.1",
-                    "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.0.1.tgz",
-                    "integrity": "sha512-SiwgrRuRD2D1R6qjwwoopKcCTkmmIWjy1M15Wv+Nk/7VUsBad4P8GOPft2t6coDZG0TuR5dq9o1v0g8wo7F6+A==",
-                    "dev": true
-                }
             }
         },
         "acorn-jsx": {
@@ -2367,14 +2359,6 @@
                 "acorn": "^6.0.2",
                 "acorn-jsx": "^5.0.0",
                 "eslint-visitor-keys": "^1.0.0"
-            },
-            "dependencies": {
-                "acorn": {
-                    "version": "6.0.4",
-                    "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.0.4.tgz",
-                    "integrity": "sha512-VY4i5EKSKkofY2I+6QLTbTTN/UvEQPCo6eiwzzSaSWfpaDhOmStMCMod6wmuPciNq+XS0faCglFu2lHZpdHUtg==",
-                    "dev": true
-                }
             }
         },
         "esprima": {
@@ -4154,6 +4138,12 @@
                 "jsdom": "^11.5.1"
             },
             "dependencies": {
+                "acorn": {
+                    "version": "5.7.4",
+                    "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
+                    "integrity": "sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==",
+                    "dev": true
+                },
                 "jsdom": {
                     "version": "11.12.0",
                     "resolved": "https://registry.npmjs.org/jsdom/-/jsdom-11.12.0.tgz",
@@ -4586,12 +4576,6 @@
                 "xml-name-validator": "^3.0.0"
             },
             "dependencies": {
-                "acorn": {
-                    "version": "6.0.4",
-                    "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.0.4.tgz",
-                    "integrity": "sha512-VY4i5EKSKkofY2I+6QLTbTTN/UvEQPCo6eiwzzSaSWfpaDhOmStMCMod6wmuPciNq+XS0faCglFu2lHZpdHUtg==",
-                    "dev": true
-                },
                 "whatwg-encoding": {
                     "version": "1.0.5",
                     "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-1.0.5.tgz",