diff --git a/nodejs/nodejs-guestbook/package-lock.json b/nodejs/nodejs-guestbook/package-lock.json
index 188a34907..3713c59f8 100644
--- a/nodejs/nodejs-guestbook/package-lock.json
+++ b/nodejs/nodejs-guestbook/package-lock.json
@@ -159,9 +159,10 @@
       }
     },
     "node_modules/ajv": {
-      "version": "6.12.6",
-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
-      "integrity": "sha512-j3fVLgvTo527anyYyJOGTYJbG+vnnQYvE0m5mmkc1TK+nxAppkCLMIL0aZ4dblVCNoGShhm+kzE4ZUykBoMg4g==",
+      "version": "6.15.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.15.0.tgz",
+      "integrity": "sha512-fgFx7Hfoq60ytK2c7DhnF8jIvzYgOMxfugjLOSMHjLIPgenqa7S7oaagATUq99mV6IYvN2tRmC0wnTYX6iPbMw==",
+      "license": "MIT",
       "dependencies": {
         "fast-deep-equal": "^3.1.1",
         "fast-json-stable-stringify": "^2.0.0",