diff --git a/solutions/object_oriented_design/online_chat/online_chat.ipynb b/solutions/object_oriented_design/online_chat/online_chat.ipynb
index b9f84ef4..20dae750 100644
--- a/solutions/object_oriented_design/online_chat/online_chat.ipynb
+++ b/solutions/object_oriented_design/online_chat/online_chat.ipynb
@@ -36,7 +36,7 @@
     "        * Post a message to a group chat\n",
     "    * Private 1-1 chat\n",
     "        * Invite a friend to a private chat\n",
-    "        * Post a meesage to a private chat\n",
+    "        * Post a message to a private chat\n",
     "* No need to worry about scaling initially"
    ]
   },