diff --git a/package-lock.json b/package-lock.json
index 3889d05..f4b66b6 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "vue-formly",
-  "version": "2.5.8",
+  "version": "2.5.9",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
@@ -3389,68 +3389,83 @@
     "express": {
       "version": "4.15.3",
       "resolved": "https://registry.npmjs.org/express/-/express-4.15.3.tgz",
-      "integrity": "sha1-urZdDwOqgMNYQIly/HAPkWlEtmI=",
+      "integrity": "sha512-eyQPXY6coAN6NpdZhXZsAvoGSvWZtYq1S6YCBA86+RTwzzecvLvgPR/Jm+MR0otFUzLnmI/lfv79aoIMDpWW8w==",
       "dev": true,
       "requires": {
-        "accepts": "1.3.3",
+        "accepts": "~1.3.3",
         "array-flatten": "1.1.1",
         "content-disposition": "0.5.2",
-        "content-type": "1.0.2",
+        "content-type": "~1.0.2",
         "cookie": "0.3.1",
         "cookie-signature": "1.0.6",
         "debug": "2.6.7",
-        "depd": "1.1.0",
-        "encodeurl": "1.0.1",
-        "escape-html": "1.0.3",
-        "etag": "1.8.0",
-        "finalhandler": "1.0.3",
+        "depd": "~1.1.0",
+        "encodeurl": "~1.0.1",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.0",
+        "finalhandler": "~1.0.3",
         "fresh": "0.5.0",
         "merge-descriptors": "1.0.1",
-        "methods": "1.1.2",
-        "on-finished": "2.3.0",
-        "parseurl": "1.3.1",
+        "methods": "~1.1.2",
+        "on-finished": "~2.3.0",
+        "parseurl": "~1.3.1",
         "path-to-regexp": "0.1.7",
-        "proxy-addr": "1.1.4",
+        "proxy-addr": "~1.1.4",
         "qs": "6.4.0",
-        "range-parser": "1.2.0",
+        "range-parser": "~1.2.0",
         "send": "0.15.3",
         "serve-static": "1.12.3",
         "setprototypeof": "1.0.3",
-        "statuses": "1.3.1",
-        "type-is": "1.6.15",
+        "statuses": "~1.3.1",
+        "type-is": "~1.6.15",
         "utils-merge": "1.0.0",
-        "vary": "1.1.1"
+        "vary": "~1.1.1"
       },
       "dependencies": {
         "accepts": {
-          "version": "1.3.3",
-          "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.3.tgz",
-          "integrity": "sha1-w8p0NJOGSMPg2cHjKN1otiLChMo=",
+          "version": "1.3.8",
+          "resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
+          "integrity": "sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==",
           "dev": true,
           "requires": {
-            "mime-types": "2.1.15",
-            "negotiator": "0.6.1"
+            "mime-types": "~2.1.34",
+            "negotiator": "0.6.3"
           }
         },
         "debug": {
           "version": "2.6.7",
           "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.7.tgz",
-          "integrity": "sha1-krrR9tBbu2u6Isyoi80OyJTChh4=",
+          "integrity": "sha512-7YoSmTDGnXYkFJOvaYXfxcvNE25Y11uZ0X8Mo+pSXjHz/9WUlbCS4O6q+wj7lhubdNQQXxxsSOnlqlDG8SenXQ==",
           "dev": true,
           "requires": {
             "ms": "2.0.0"
           }
         },
+        "mime-db": {
+          "version": "1.52.0",
+          "resolved": "https://registry.npmjs.org/mime-db/-/mime-db-1.52.0.tgz",
+          "integrity": "sha512-sPU4uV7dYlvtWJxwwxHD0PuihVNiE7TyAbQ5SWxDCB9mUYvOgroQOwYQQOKPJ8CIbE+1ETVlOoK1UC2nU3gYvg==",
+          "dev": true
+        },
+        "mime-types": {
+          "version": "2.1.35",
+          "resolved": "https://registry.npmjs.org/mime-types/-/mime-types-2.1.35.tgz",
+          "integrity": "sha512-ZDY+bPm5zTTF+YpCrAU9nK0UgICYPT0QtT1NZWFv4s++TNkcgVaT0g6+4R2uI4MjQjzysHB1zxuWL50hzaeXiw==",
+          "dev": true,
+          "requires": {
+            "mime-db": "1.52.0"
+          }
+        },
         "negotiator": {
-          "version": "0.6.1",
-          "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.1.tgz",
-          "integrity": "sha1-KzJxhOiZIQEXeyhWP7XnECrNDKk=",
+          "version": "0.6.3",
+          "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.3.tgz",
+          "integrity": "sha512-+EUsqGPLsM+j/zdChZjsnX51g4XrHFOIXwfnCVPGlQk/k5giakcKsuxCObBRu6DSm9opw/O6slWbJdghQM4bBg==",
           "dev": true
         },
         "qs": {
           "version": "6.4.0",
           "resolved": "https://registry.npmjs.org/qs/-/qs-6.4.0.tgz",
-          "integrity": "sha1-E+JtKK1rD/qpExLNO/cI7TUecjM=",
+          "integrity": "sha512-Qs6dfgR5OksK/PSxl1kGxiZgEQe8RqJMB9wZqVlKQfU+zzV+HY77pWJnoJENACKDQByWdpr8ZPIh1TBi4lpiSQ==",
           "dev": true
         }
       }
@@ -3763,7 +3778,8 @@
         "ansi-regex": {
           "version": "2.1.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "aproba": {
           "version": "1.1.1",
@@ -3814,7 +3830,8 @@
         "balanced-match": {
           "version": "0.4.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "bcrypt-pbkdf": {
           "version": "1.0.1",
@@ -3829,6 +3846,7 @@
           "version": "0.0.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "inherits": "2.0.3"
           }
@@ -3837,6 +3855,7 @@
           "version": "2.10.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "hoek": "2.16.3"
           }
@@ -3845,6 +3864,7 @@
           "version": "1.1.7",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "0.4.2",
             "concat-map": "0.0.1"
@@ -3853,7 +3873,8 @@
         "buffer-shims": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "caseless": {
           "version": "0.12.0",
@@ -3870,12 +3891,14 @@
         "code-point-at": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "combined-stream": {
           "version": "1.0.5",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "delayed-stream": "1.0.0"
           }
@@ -3883,17 +3906,20 @@
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "cryptiles": {
           "version": "2.0.5",
@@ -3939,7 +3965,8 @@
         "delayed-stream": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "delegates": {
           "version": "1.0.0",
@@ -3965,7 +3992,8 @@
         "extsprintf": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "forever-agent": {
           "version": "0.6.1",
@@ -3987,12 +4015,14 @@
         "fs.realpath": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "fstream": {
           "version": "1.0.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "graceful-fs": "4.1.11",
             "inherits": "2.0.3",
@@ -4048,6 +4078,7 @@
           "version": "7.1.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "fs.realpath": "1.0.0",
             "inflight": "1.0.6",
@@ -4060,7 +4091,8 @@
         "graceful-fs": {
           "version": "4.1.11",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "har-schema": {
           "version": "1.0.5",
@@ -4099,7 +4131,8 @@
         "hoek": {
           "version": "2.16.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "http-signature": {
           "version": "1.1.1",
@@ -4116,6 +4149,7 @@
           "version": "1.0.6",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "once": "1.4.0",
             "wrappy": "1.0.2"
@@ -4124,7 +4158,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.4",
@@ -4136,6 +4171,7 @@
           "version": "1.0.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "number-is-nan": "1.0.1"
           }
@@ -4149,7 +4185,8 @@
         "isarray": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "isstream": {
           "version": "0.1.2",
@@ -4222,12 +4259,14 @@
         "mime-db": {
           "version": "1.27.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "mime-types": {
           "version": "2.1.15",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "mime-db": "1.27.0"
           }
@@ -4236,6 +4275,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "1.1.7"
           }
@@ -4243,12 +4283,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "mkdirp": {
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }
@@ -4301,7 +4343,8 @@
         "number-is-nan": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "oauth-sign": {
           "version": "0.8.2",
@@ -4319,6 +4362,7 @@
           "version": "1.4.0",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "wrappy": "1.0.2"
           }
@@ -4348,7 +4392,8 @@
         "path-is-absolute": {
           "version": "1.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "performance-now": {
           "version": "0.2.0",
@@ -4359,7 +4404,8 @@
         "process-nextick-args": {
           "version": "1.0.7",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "punycode": {
           "version": "1.4.1",
@@ -4397,6 +4443,7 @@
           "version": "2.2.9",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "buffer-shims": "1.0.0",
             "core-util-is": "1.0.2",
@@ -4441,6 +4488,7 @@
           "version": "2.6.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "glob": "7.1.2"
           }
@@ -4448,7 +4496,8 @@
         "safe-buffer": {
           "version": "5.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "semver": {
           "version": "5.3.0",
@@ -4506,6 +4555,7 @@
           "version": "1.0.2",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "code-point-at": "1.1.0",
             "is-fullwidth-code-point": "1.0.0",
@@ -4516,6 +4566,7 @@
           "version": "1.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "5.0.1"
           }
@@ -4530,6 +4581,7 @@
           "version": "3.0.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "ansi-regex": "2.1.1"
           }
@@ -4544,6 +4596,7 @@
           "version": "2.2.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "block-stream": "0.0.9",
             "fstream": "1.0.11",
@@ -4599,7 +4652,8 @@
         "util-deprecate": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "uuid": {
           "version": "3.0.1",
@@ -4628,7 +4682,8 @@
         "wrappy": {
           "version": "1.0.2",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         }
       }
     },