diff --git a/websocket-demo-pollin/package-lock.json b/websocket-demo-pollin/package-lock.json
index 188fbda..9499f66 100644
--- a/websocket-demo-pollin/package-lock.json
+++ b/websocket-demo-pollin/package-lock.json
@@ -10,9 +10,9 @@
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-      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.0.tgz",
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+      "version": "6.12.6",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
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