diff --git a/package-lock.json b/package-lock.json
index ca6ae62..3384db0 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -34,9 +34,9 @@
       }
     },
     "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
     },
     "arr-diff": {
@@ -1975,14 +1975,6 @@
         "@types/estree": "0.0.39",
         "@types/node": "*",
         "acorn": "^6.1.0"
-      },
-      "dependencies": {
-        "acorn": {
-          "version": "6.1.0",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.0.tgz",
-          "integrity": "sha512-MW/FjM+IvU9CgBzjO3UIPCE2pyEwUsoFl+VGdczOPEdxfGFjuKny/gN54mOuX7Qxmb9Rg9MCn2oKiSUeW+pjrw==",
-          "dev": true
-        }
       }
     },
     "rollup-plugin-commonjs": {
@@ -2032,6 +2024,12 @@
         "rollup-pluginutils": "^2.3.1"
       },
       "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
+        },
         "magic-string": {
           "version": "0.22.5",
           "resolved": "https://registry.npmjs.org/magic-string/-/magic-string-0.22.5.tgz",