diff --git a/se/10-system/03-websocket/more/02-chat2jquery/package-lock.json b/se/10-system/03-websocket/more/02-chat2jquery/package-lock.json
index 27ecb60..cdaa203 100644
--- a/se/10-system/03-websocket/more/02-chat2jquery/package-lock.json
+++ b/se/10-system/03-websocket/more/02-chat2jquery/package-lock.json
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+      "resolved": "https://registry.npmjs.org/xmlhttprequest-ssl/-/xmlhttprequest-ssl-1.6.3.tgz",
+      "integrity": "sha512-3XfeQE/wNkvrIktn2Kf0869fC0BN6UpydVasGIeSm2B1Llihf7/0UfZM+eCkOw3P7bP4+qPgqhm7ZoxuJtFU0Q=="
     },
     "yeast": {
       "version": "0.1.2",
       "resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",
-      "integrity": "sha1-AI4G2AlDIMNy28L47XagymyKxBk="
+      "integrity": "sha512-8HFIh676uyGYP6wP13R/j6OJ/1HwJ46snpvzE7aHAN3Ryqh2yX6Xox2B4CUmTwwOIzlG3Bs7ocsP5dZH/R1Qbg=="
+    },
+    "ylru": {
+      "version": "1.3.2",
+      "resolved": "https://registry.npmjs.org/ylru/-/ylru-1.3.2.tgz",
+      "integrity": "sha512-RXRJzMiK6U2ye0BlGGZnmpwJDPgakn6aNQ0A7gHRbD4I0uvK4TW6UqkK1V0pp9jskjJBAXd3dRrbzWkqJ+6cxA=="
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   }
 }
diff --git a/se/10-system/03-websocket/more/02-chat2jquery/package.json b/se/10-system/03-websocket/more/02-chat2jquery/package.json
index 6510d9d..a7867bf 100644
--- a/se/10-system/03-websocket/more/02-chat2jquery/package.json
+++ b/se/10-system/03-websocket/more/02-chat2jquery/package.json
@@ -10,7 +10,7 @@
     "express": "4.13.4",
     "koa": "^2.5.3",
     "koa-static": "^5.0.0",
-    "socket.io": "^2.3.0"
+    "socket.io": "^2.5.0"
   },
   "scripts": {
     "start": "node index.js"