diff --git a/package-lock.json b/package-lock.json
index de9123d..970fb58 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -326,10 +326,10 @@
       "integrity": "sha512-nvfrjqvt9xQ8Z/w0ijewdD/vvWDTOweBUm96NTr66Wfvo1mJenBLwcYmPs3TIBP5ruzYGD7Hx/DaM9RmhroGPw==",
       "dev": true,
       "requires": {
-        "neo-async": "2.6.1",
-        "optimist": "0.6.1",
-        "source-map": "0.6.1",
-        "uglify-js": "3.6.0"
+        "neo-async": "^2.6.0",
+        "optimist": "^0.6.1",
+        "source-map": "^0.6.1",
+        "uglify-js": "^3.1.4"
       }
     },
     "has-flag": {