diff --git a/package-lock.json b/package-lock.json
old mode 100755
new mode 100644
index 86d4225..bea7293
--- a/package-lock.json
+++ b/package-lock.json
@@ -108,9 +108,9 @@
       }
     },
     "acorn": {
-      "version": "6.1.0",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.1.0.tgz",
-      "integrity": "sha512-MW/FjM+IvU9CgBzjO3UIPCE2pyEwUsoFl+VGdczOPEdxfGFjuKny/gN54mOuX7Qxmb9Rg9MCn2oKiSUeW+pjrw==",
+      "version": "6.4.2",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-6.4.2.tgz",
+      "integrity": "sha512-XtGIhXwF8YM8bJhGxG5kXgjkEuNGLTkoYqVE+KMR+aspr4KGYmKYg7yUe3KghyQ9yheNwLnjmzh/7+gfDBmHCQ==",
       "dev": true
     },
     "acorn-jsx": {