diff --git a/solidityExample/vue-chain-demo/package-lock.json b/solidityExample/vue-chain-demo/package-lock.json
index 3f18ca1..c675e9a 100644
--- a/solidityExample/vue-chain-demo/package-lock.json
+++ b/solidityExample/vue-chain-demo/package-lock.json
@@ -10664,9 +10664,9 @@
       "integrity": "sha1-fjL3W0E4EpHQRhHxvxQQmsAGUdc="
     },
     "qs": {
-      "version": "6.9.4",
-      "resolved": "https://registry.npmjs.org/qs/-/qs-6.9.4.tgz",
-      "integrity": "sha512-A1kFqHekCTM7cz0udomYUoYNWjBebHm/5wzU/XqrBRBNWectVH0QIiN+NEcZ0Dte5hvzHwbr8+XQmguPhJ6WdQ=="
+      "version": "6.9.7",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.9.7.tgz",
+      "integrity": "sha512-IhMFgUmuNpyRfxA90umL7ByLlgRXu6tIfKPpF5TmcfRLlLCckfP/g3IQmju6jjpu+Hh8rA+2p6A27ZSPOOHdKw=="
     },
     "query-string": {
       "version": "4.3.4",
diff --git a/solidityExample/vue-chain-demo/package.json b/solidityExample/vue-chain-demo/package.json
index 0e0dc53..6d322e4 100644
--- a/solidityExample/vue-chain-demo/package.json
+++ b/solidityExample/vue-chain-demo/package.json
@@ -26,7 +26,7 @@
     "clipboard": "^2.0.6",
     "js-base64": "^2.5.2",
     "nuxt": "^2.4.0",
-    "qs": "^6.6.0",
+    "qs": "^6.9.7",
     "v-clipboard": "^2.2.3",
     "vue-clipboard2": "^0.3.1",
     "vue-cookie": "^1.1.4",