diff --git a/slide_master/package.json b/slide_master/package.json
index 62b392b..6692b76 100644
--- a/slide_master/package.json
+++ b/slide_master/package.json
@@ -25,7 +25,7 @@
     "express": "~4.17.1",
     "grunt-cli": "~1.2.0",
     "mustache": "~3.1.0",
-    "socket.io": "^1.4.8"
+    "socket.io": ">=3.1.1"
   },
   "devDependencies": {
     "grunt": "~1.0.1",