diff --git a/package-lock.json b/package-lock.json
index fb82687..ad3919d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1291,14 +1291,14 @@
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       "dev": true,
       "requires": {
-        "acorn": "5.5.3",
+        "acorn": "5.7.4",
         "acorn-jsx": "3.0.1"
       },
       "dependencies": {
         "acorn": {
-          "version": "5.5.3",
-          "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.5.3.tgz",
-          "integrity": "sha512-jd5MkIUlbbmb07nXH0DT3y7rDVtkzDi4XZOUVWAer8ajmF/DTSSbl5oNFyDOl/OXA33Bl79+ypHhl2pN20VeOQ==",
+          "version": "5.7.4",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
+          "integrity": "sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==",
           "dev": true
         }
       }