diff --git a/client/common/configuration/register.ts b/client/common/configuration/register.ts
index 9903da0d..01adfeda 100644
--- a/client/common/configuration/register.ts
+++ b/client/common/configuration/register.ts
@@ -25,19 +25,6 @@ async function registerConfiguration (clientOptions: RegisterClientOptions): Pro
           throw new Error('missing room parameter')
         }
 
-        const response = await fetch(
-          getBaseRoute(clientOptions) + '/api/configuration/room/' + encodeURIComponent(roomKey),
-          {
-            method: 'GET',
-            headers: peertubeHelpers.getAuthHeader()
-          }
-        )
-        if (!response.ok) {
-          throw new Error('Can\'t get channel configuration options.')
-        }
-
-        const converseJSParams: InitConverseJSParams = await (response).json()
-
         const container = document.createElement('div')
         container.classList.add('livechat-embed-fullpage')
         rootEl.append(container)
@@ -55,10 +42,23 @@ async function registerConfiguration (clientOptions: RegisterClientOptions): Pro
 
         const authHeader = peertubeHelpers.getAuthHeader()
 
+        const response = await fetch(
+          getBaseRoute(clientOptions) + '/api/configuration/room/' + encodeURIComponent(roomKey),
+          {
+            method: 'GET',
+            headers: peertubeHelpers.getAuthHeader()
+          }
+        )
+        if (!response.ok) {
+          throw new Error('Can\'t get channel configuration options.')
+        }
+        const converseJSParams: InitConverseJSParams = await (response).json()
+
         await loadConverseJS(converseJSParams)
         window.initConverse(converseJSParams, 'peertube-fullpage', authHeader ?? null)
       } catch (err) {
         console.error('[peertube-plugin-livechat] ' + (err as string))
+        // FIXME: do a better error page.
         rootEl.innerText = await peertubeHelpers.translate(LOC_NOT_FOUND)
       }
     }
diff --git a/conversejs/builtin.ts b/conversejs/builtin.ts
index dfdd1474..8d29f54e 100644
--- a/conversejs/builtin.ts
+++ b/conversejs/builtin.ts
@@ -26,6 +26,7 @@ declare global {
     }
     initConversePlugins: typeof initConversePlugins
     initConverse: typeof initConverse
+    reconnectConverse?: (room: string) => void
   }
 }
 
@@ -142,7 +143,11 @@ async function initConverse (
       params.blacklisted_plugins.push('livechatViewerModePlugin')
     }
 
-    converse.initialize(params)
+    if (window.reconnectConverse) { // this is set in the livechatSpecificsPlugin
+      window.reconnectConverse(params)
+    } else {
+      converse.initialize(params)
+    }
   } catch (error) {
     console.error('Failed initializing converseJS', error)
   }
diff --git a/conversejs/lib/plugins/livechat-specific.ts b/conversejs/lib/plugins/livechat-specific.ts
index d6adea6d..9028e2fc 100644
--- a/conversejs/lib/plugins/livechat-specific.ts
+++ b/conversejs/lib/plugins/livechat-specific.ts
@@ -15,6 +15,32 @@ export const livechatSpecificsPlugin = {
       window.converse.livechatDisconnect = undefined // will be set again on next initialize.
     }
 
+    // To reconnect ConverseJS when joining another room (or the same one),
+    // we store the relevant closure function:
+    window.reconnectConverse = function reconnectConverse (params: any): void {
+      console.log('[livechatSpecificsPlugin] reconnecting converseJS...')
+
+      // The new room to join:
+      _converse.api.settings.set('auto_join_rooms', params.auto_join_rooms)
+      _converse.api.settings.set('notify_all_room_messages', params.notify_all_room_messages)
+
+      // update connection parameters (in case the user logged in after the first chat)
+      for (const k of [
+        'bosh_service_url', 'websocket_url',
+        'authentication', 'nickname', 'muc_nickname_from_jid', 'auto_login', 'jid', 'password', 'keepalive'
+      ]) {
+        _converse.api.settings.set(k, params[k])
+      }
+
+      // update other settings
+      for (const k of ['hide_muc_participants', 'blacklisted_plugins']) {
+        _converse.api.settings.set(k, params[k])
+      }
+
+      // Then login.
+      _converse.api.user.login()
+    }
+
     if (window.location.protocol === 'http:') {
       // We are probably on a dev instance, so we will add _converse in window:
       (window as any)._livechatConverse = _converse