diff --git a/5g-network/package.json b/5g-network/package.json
index ba44307..477020d 100644
--- a/5g-network/package.json
+++ b/5g-network/package.json
@@ -37,7 +37,7 @@
     "grunt-retire": "1.0.8",
     "grunt-zip": "0.18.2",
     "mustache": "4.2.0",
-    "socket.io": "1.7.4"
+    "socket.io": "2.4.0"
   },
   "license": "MIT"
 }
diff --git a/5g-network/plugin/multiplex/package.json b/5g-network/plugin/multiplex/package.json
index 5af3248..8a882c0 100644
--- a/5g-network/plugin/multiplex/package.json
+++ b/5g-network/plugin/multiplex/package.json
@@ -13,7 +13,7 @@
     "express": "4.17.1",
     "grunt-cli": "0.1.13",
     "mustache": "4.2.0",
-    "socket.io": "1.7.4"
+    "socket.io": "2.4.0"
   },
   "license": "MIT"
 }
diff --git a/data-warehouse-vs-data-lake/package.json b/data-warehouse-vs-data-lake/package.json
index 2fe42e4..07d7819 100644
--- a/data-warehouse-vs-data-lake/package.json
+++ b/data-warehouse-vs-data-lake/package.json
@@ -37,7 +37,7 @@
     "grunt-retire": "1.0.8",
     "grunt-zip": "0.18.2",
     "mustache": "4.2.0",
-    "socket.io": "1.7.4"
+    "socket.io": "2.4.0"
   },
   "license": "MIT"
 }