diff --git a/model.py b/model.py
index 5bee14b..fc3d138 100644
--- a/model.py
+++ b/model.py
@@ -59,7 +59,7 @@ class Model(object):
     @ApiMethod
     async def join_session(self, clientid, sessionid):
         if sessionid in self.model["sessions"]:
-            self.model["sessions"][sessionid].append(clientid)
+            self.model["sessions"][sessionid]["clients"].append(clientid)
         else:
             raise Exception(f"Session {sessionid} does not exist")
 
diff --git a/ui.html b/ui.html
index fc705d5..a54cad4 100644
--- a/ui.html
+++ b/ui.html
@@ -26,7 +26,7 @@ this is the UI
         })
     };
     document.getElementById("btn_join_session").onclick = async function (e) {
-        let text = document.getElementById("join_session_id").text
+        let text = document.getElementById("join_session_id").value
         let data = {"sessionid": text};
 
         await fetch('api/join_session', {