diff --git a/teachings.json b/teachings.json
index 6738bfd..d53f99b 100644
--- a/teachings.json
+++ b/teachings.json
@@ -251,7 +251,7 @@
   {
     "name": "Reti di calcolatori",
     "url": "reti-di-calcolatori",
-    "chat": "t.me/joinchat/Sw2Ykp0-0mM1Zjdk",
+    "chat": "t.me/+PnzVouieQLg1ODE0",
     "website": "455456",
     "professors": ["luciano.bononi"]
   },