diff --git a/pmodelhub-python/webapp/package-lock.json b/pmodelhub-python/webapp/package-lock.json
index 562e4b6..367f5d2 100644
--- a/pmodelhub-python/webapp/package-lock.json
+++ b/pmodelhub-python/webapp/package-lock.json
@@ -9821,6 +9821,7 @@
                     "resolved": "https://registry.npm.taobao.org/braces/download/braces-2.3.2.tgz",
                     "integrity": "sha1-WXn9PxTNUxVl5fot8av/8d+u5yk=",
                     "dev": true,
+                    "optional": true,
                     "requires": {
                         "arr-flatten": "^1.1.0",
                         "array-unique": "^0.3.2",
@@ -9839,6 +9840,7 @@
                             "resolved": "https://registry.npm.taobao.org/extend-shallow/download/extend-shallow-2.0.1.tgz",
                             "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
                             "dev": true,
+                            "optional": true,
                             "requires": {
                                 "is-extendable": "^0.1.0"
                             }
@@ -9871,6 +9873,7 @@
                     "resolved": "https://registry.npm.taobao.org/fill-range/download/fill-range-4.0.0.tgz",
                     "integrity": "sha1-1USBHUKPmOsGpj3EAtJAPDKMOPc=",
                     "dev": true,
+                    "optional": true,
                     "requires": {
                         "extend-shallow": "^2.0.1",
                         "is-number": "^3.0.0",
@@ -9883,6 +9886,7 @@
                             "resolved": "https://registry.npm.taobao.org/extend-shallow/download/extend-shallow-2.0.1.tgz",
                             "integrity": "sha1-Ua99YUrZqfYQ6huvu5idaxxWiQ8=",
                             "dev": true,
+                            "optional": true,
                             "requires": {
                                 "is-extendable": "^0.1.0"
                             }
@@ -9938,6 +9942,7 @@
                     "resolved": "https://registry.npm.taobao.org/is-number/download/is-number-3.0.0.tgz",
                     "integrity": "sha1-JP1iAaR4LPUFYcgQJ2r8fRLXEZU=",
                     "dev": true,
+                    "optional": true,
                     "requires": {
                         "kind-of": "^3.0.2"
                     },
@@ -9947,6 +9952,7 @@
                             "resolved": "https://registry.npm.taobao.org/kind-of/download/kind-of-3.2.2.tgz",
                             "integrity": "sha1-MeohpzS6ubuw8yRm2JOupR5KPGQ=",
                             "dev": true,
+                            "optional": true,
                             "requires": {
                                 "is-buffer": "^1.1.5"
                             }
@@ -9958,6 +9964,7 @@
                     "resolved": "https://registry.npm.taobao.org/micromatch/download/micromatch-3.1.10.tgz",
                     "integrity": "sha1-cIWbyVyYQJUvNZoGij/En57PrCM=",
                     "dev": true,
+                    "optional": true,
                     "requires": {
                         "arr-diff": "^4.0.0",
                         "array-unique": "^0.3.2",
@@ -9991,6 +9998,7 @@
                     "resolved": "https://registry.npm.taobao.org/to-regex-range/download/to-regex-range-2.1.1.tgz",
                     "integrity": "sha1-fIDBe53+vlmeJzZ+DU3VWQFB2zg=",
                     "dev": true,
+                    "optional": true,
                     "requires": {
                         "is-number": "^3.0.0",
                         "repeat-string": "^1.6.1"
@@ -10785,9 +10793,9 @@
             "dev": true
         },
         "ws": {
-            "version": "6.2.1",
-            "resolved": "https://registry.npm.taobao.org/ws/download/ws-6.2.1.tgz?cache=0&sync_timestamp=1593925601875&other_urls=https%3A%2F%2Fregistry.npm.taobao.org%2Fws%2Fdownload%2Fws-6.2.1.tgz",
-            "integrity": "sha1-RC/fCkftZPWbal2P8TD0dI7VJPs=",
+            "version": "6.2.2",
+            "resolved": "https://registry.npmjs.org/ws/-/ws-6.2.2.tgz",
+            "integrity": "sha512-zmhltoSR8u1cnDsD43TX59mzoMZsLKqUweyYBAIvTngR3shc0W6aOZylZmq/7hqyVxPdi+5Ud2QInblgyE72fw==",
             "dev": true,
             "requires": {
                 "async-limiter": "~1.0.0"