diff --git a/demo/package-lock.json b/demo/package-lock.json
index 2ffab1e..7badfd3 100644
--- a/demo/package-lock.json
+++ b/demo/package-lock.json
@@ -5115,16 +5115,8 @@
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             "iconv-lite": "0.4.24",
             "on-finished": "~2.3.0",
-            "qs": "6.7.0",
             "raw-body": "2.4.0",
             "type-is": "~1.6.17"
-          },
-          "dependencies": {
-            "qs": {
-              "version": "6.7.0",
-              "resolved": "https://registry.npmjs.org/qs/-/qs-6.7.0.tgz",
-              "integrity": "sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ=="
-            }
           }
         },
         "brace-expansion": {
@@ -6177,7 +6169,6 @@
             "parseurl": "~1.3.3",
             "path-to-regexp": "0.1.7",
             "proxy-addr": "~2.0.5",
-            "qs": "6.7.0",
             "range-parser": "~1.2.1",
             "safe-buffer": "5.1.2",
             "send": "0.17.1",
@@ -6187,13 +6178,6 @@
             "type-is": "~1.6.18",
             "utils-merge": "1.0.1",
             "vary": "~1.1.2"
-          },
-          "dependencies": {
-            "qs": {
-              "version": "6.7.0",
-              "resolved": "https://registry.npmjs.org/qs/-/qs-6.7.0.tgz",
-              "integrity": "sha512-VCdBRNFTX1fyE7Nb6FYoURo/SPe62QCaAyzJvUjwRaIsc+NePBEniHlvxFmmX56+HZphIGtV0XeCirBtpDrTyQ=="
-            }
           }
         },
         "ext": {
@@ -8864,11 +8848,6 @@
           "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.1.1.tgz",
           "integrity": "sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A=="
         },
-        "qs": {
-          "version": "6.5.2",
-          "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.2.tgz",
-          "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA=="
-        },
         "querystring": {
           "version": "0.2.0",
           "resolved": "https://registry.npmjs.org/querystring/-/querystring-0.2.0.tgz",
@@ -9007,7 +8986,6 @@
             "mime-types": "~2.1.19",
             "oauth-sign": "~0.9.0",
             "performance-now": "^2.1.0",
-            "qs": "~6.5.2",
             "safe-buffer": "^5.1.2",
             "tough-cookie": "~2.4.3",
             "tunnel-agent": "^0.6.0",
@@ -11522,9 +11500,9 @@
       },
       "dependencies": {
         "qs": {
-          "version": "6.5.2",
-          "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.2.tgz",
-          "integrity": "sha512-N5ZAX4/LxJmF+7wN74pUD6qAh9/wnvdQcjq9TZjevvXzSUo7bfmw91saqMjzGS2xq91/odN2dW/WOl7qQHNDGA==",
+          "version": "6.5.3",
+          "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.3.tgz",
+          "integrity": "sha512-qxXIEh4pCGfHICj1mAJQ2/2XVZkjCDTcEgfoSQxc/fYivUZxTkk7L3bDBJSoNrEzXI17oUO5Dp07ktqE5KzczA==",
           "dev": true
         }
       }