diff --git a/example/package-lock.json b/example/package-lock.json
index 246c9d1..eb3211f 100644
--- a/example/package-lock.json
+++ b/example/package-lock.json
@@ -207,9 +207,9 @@
             }
         },
         "acorn": {
-            "version": "6.3.0",
-            "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.3.0.tgz",
-            "integrity": "sha512-/czfa8BwS88b9gWQVhc8eknunSA2DoJpJyTQkhheIf5E48u1N0R4q/YxxsAeqRrmK9TQ/uYfgLDfZo91UlANIA=="
+            "version": "6.4.1",
+            "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.1.tgz",
+            "integrity": "sha512-ZVA9k326Nwrj3Cj9jlh3wGFutC2ZornPNARZwsNYqQYgN0EsV2d53w5RN/co65Ohn4sUAUtb1rSUAOD6XN9idA=="
         },
         "ajv": {
             "version": "6.10.2",