diff --git a/package-lock.json b/package-lock.json
index 1d20620..708025f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -592,9 +592,9 @@
       }
     },
     "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==",
       "dev": true
     },
     "ajv": {
@@ -5144,12 +5144,6 @@
         }
       }
     },
-    "serialize-javascript": {
-      "version": ">=2.1.1",
-      "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-1.7.0.tgz",
-      "integrity": "sha512-ke8UG8ulpFOxO8f8gRYabHQe/ZntKlcig2Mp+8+URDP1D8vJZ0KUt7LYo07q25Z/+JVSgpr/cui9PIp5H6/+nA==",
-      "dev": true
-    },
     "serve-index": {
       "version": "1.9.1",
       "resolved": "https://registry.npmjs.org/serve-index/-/serve-index-1.9.1.tgz",
@@ -5827,6 +5821,12 @@
         "worker-farm": "^1.7.0"
       },
       "dependencies": {
+        "serialize-javascript": {
+          "version": "3.0.0",
+          "resolved": "https://registry.npmjs.org/serialize-javascript/-/serialize-javascript-3.0.0.tgz",
+          "integrity": "sha512-skZcHYw2vEX4bw90nAr2iTTsz6x2SrHEnfxgKYmZlvJYBEZrvbKtobJWlQ20zczKb3bsHHXXTYt48zBA7ni9cw==",
+          "dev": true
+        },
         "source-map": {
           "version": "0.6.1",
           "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",