diff --git a/package-lock.json b/package-lock.json
index aae1bf8..a3d17f6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1559,9 +1559,9 @@
       }
     },
     "acorn": {
-      "version": "6.3.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
-      "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA==",
+      "version": "5.7.4",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
+      "integrity": "sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==",
       "dev": true
     },
     "acorn-globals": {
@@ -1571,14 +1571,6 @@
       "dev": true,
       "requires": {
         "acorn": "^5.0.0"
-      },
-      "dependencies": {
-        "acorn": {
-          "version": "5.7.1",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.1.tgz",
-          "integrity": "sha512-d+nbxBUGKg7Arpsvbnlq61mc12ek3EY8EQldM3GPAhWJ1UVxC6TDGbIvUMNU6obBX3i1+ptCIzV4vq0gFPEGVQ==",
-          "dev": true
-        }
       }
     },
     "acorn-walk": {
@@ -9765,12 +9757,6 @@
         "xml-name-validator": "^3.0.0"
       },
       "dependencies": {
-        "acorn": {
-          "version": "5.7.1",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.1.tgz",
-          "integrity": "sha512-d+nbxBUGKg7Arpsvbnlq61mc12ek3EY8EQldM3GPAhWJ1UVxC6TDGbIvUMNU6obBX3i1+ptCIzV4vq0gFPEGVQ==",
-          "dev": true
-        },
         "ajv": {
           "version": "5.5.2",
           "resolved": "https://registry.npmjs.org/ajv/-/ajv-5.5.2.tgz",
@@ -16711,6 +16697,12 @@
         "webpack-sources": "^1.4.1"
       },
       "dependencies": {
+        "acorn": {
+          "version": "6.4.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+          "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
+          "dev": true
+        },
         "arr-diff": {
           "version": "4.0.0",
           "resolved": "https://registry.npmjs.org/arr-diff/-/arr-diff-4.0.0.tgz",
@@ -17017,6 +17009,12 @@
         "ws": "^6.0.0"
       },
       "dependencies": {
+        "acorn": {
+          "version": "6.4.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+          "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA==",
+          "dev": true
+        },
         "ansi-styles": {
           "version": "3.2.1",
           "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-3.2.1.tgz",