diff --git a/package.json b/package.json
index fdc7afd..d7d37ef 100644
--- a/package.json
+++ b/package.json
@@ -53,11 +53,13 @@
         "watch:labextension": "jupyter labextension watch ."
     },
     "dependencies": {
-        "@jupyter/chat": "^0.1.0",
-        "@jupyterlab/application": "^4.0.0",
-        "@jupyterlab/apputils": "^4.0.0",
-        "@jupyterlab/completer": "^4.0.0",
-        "@jupyterlab/settingregistry": "^4.0.0",
+        "@jupyter/chat": "^0.5.0",
+        "@jupyterlab/application": "^4.2.0",
+        "@jupyterlab/apputils": "^4.3.0",
+        "@jupyterlab/completer": "^4.2.0",
+        "@jupyterlab/notebook": "^4.2.0",
+        "@jupyterlab/rendermime": "^4.2.0",
+        "@jupyterlab/settingregistry": "^4.2.0",
         "@lumino/coreutils": "^2.1.2",
         "@lumino/polling": "^2.1.2",
         "@mistralai/mistralai": "^0.5.0"
diff --git a/schema/chat.json b/schema/chat.json
index 0fe5e40..0a93a89 100644
--- a/schema/chat.json
+++ b/schema/chat.json
@@ -8,6 +8,12 @@
       "type": "boolean",
       "default": false,
       "readOnly": false
+    },
+    "enableCodeToolbar": {
+      "description": "Whether to enable or not the code toolbar.",
+      "type": "boolean",
+      "default": true,
+      "readOnly": false
     }
   },
   "additionalProperties": false
diff --git a/src/handler.ts b/src/handler.ts
index f4bf2c1..a839c20 100644
--- a/src/handler.ts
+++ b/src/handler.ts
@@ -23,12 +23,12 @@ export class CodestralHandler extends ChatModel {
     this._mistralClient = options.mistralClient;
   }
 
-  async addMessage(message: INewMessage): Promise<boolean> {
+  async sendMessage(message: INewMessage): Promise<boolean> {
     message.id = UUID.uuid4();
     const msg: IChatMessage = {
       id: message.id,
       body: message.body,
-      sender: 'User',
+      sender: { username: 'User' },
       time: Date.now(),
       type: 'msg'
     };
@@ -38,7 +38,7 @@ export class CodestralHandler extends ChatModel {
       model: 'codestral-latest',
       messages: this._history.messages.map(msg => {
         return {
-          role: msg.sender === 'User' ? 'user' : 'assistant',
+          role: msg.sender.username === 'User' ? 'user' : 'assistant',
           content: msg.body
         };
       })
@@ -50,7 +50,7 @@ export class CodestralHandler extends ChatModel {
     const botMsg: IChatMessage = {
       id: UUID.uuid4(),
       body: botMessage.content as string,
-      sender: 'Codestral',
+      sender: { username: 'Codestral' },
       time: Date.now(),
       type: 'msg'
     };
diff --git a/src/index.ts b/src/index.ts
index 5c9abe0..8666dae 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,15 +1,19 @@
+import {
+  ActiveCellManager,
+  buildChatSidebar,
+  buildErrorWidget,
+  IActiveCellManager
+} from '@jupyter/chat';
 import {
   JupyterFrontEnd,
   JupyterFrontEndPlugin
 } from '@jupyterlab/application';
+import { ReactWidget, IThemeManager } from '@jupyterlab/apputils';
 import { ICompletionProviderManager } from '@jupyterlab/completer';
+import { INotebookTracker } from '@jupyterlab/notebook';
+import { IRenderMimeRegistry } from '@jupyterlab/rendermime';
 import { ISettingRegistry } from '@jupyterlab/settingregistry';
 import { CodestralProvider } from './provider';
-
-import { buildChatSidebar, buildErrorWidget } from '@jupyter/chat';
-import { ReactWidget, IThemeManager } from '@jupyterlab/apputils';
-import { IRenderMimeRegistry } from '@jupyterlab/rendermime';
-
 import MistralClient from '@mistralai/mistralai';
 
 import { CodestralHandler } from './handler';
@@ -52,22 +56,36 @@ const chatPlugin: JupyterFrontEndPlugin<void> = {
   id: 'jupyterlab-codestral:chat',
   description: 'Codestral chat extension',
   autoStart: true,
-  optional: [ISettingRegistry, IThemeManager],
+  optional: [INotebookTracker, ISettingRegistry, IThemeManager],
   requires: [IRenderMimeRegistry],
   activate: async (
     app: JupyterFrontEnd,
     rmRegistry: IRenderMimeRegistry,
+    notebookTracker: INotebookTracker | null,
     settingsRegistry: ISettingRegistry | null,
     themeManager: IThemeManager | null
   ) => {
-    const chatHandler = new CodestralHandler({ mistralClient });
+    let activeCellManager: IActiveCellManager | null = null;
+    if (notebookTracker) {
+      activeCellManager = new ActiveCellManager({
+        tracker: notebookTracker,
+        shell: app.shell
+      });
+    }
+
+    const chatHandler = new CodestralHandler({
+      mistralClient,
+      activeCellManager: activeCellManager
+    });
 
     let sendWithShiftEnter = false;
+    let enableCodeToolbar = true;
 
     function loadSetting(setting: ISettingRegistry.ISettings): void {
       sendWithShiftEnter = setting.get('sendWithShiftEnter')
         .composite as boolean;
-      chatHandler.config = { sendWithShiftEnter };
+      enableCodeToolbar = setting.get('enableCodeToolbar').composite as boolean;
+      chatHandler.config = { sendWithShiftEnter, enableCodeToolbar };
     }
 
     Promise.all([app.restored, settingsRegistry?.load(chatPlugin.id)])
@@ -89,7 +107,11 @@ const chatPlugin: JupyterFrontEndPlugin<void> = {
 
     let chatWidget: ReactWidget | null = null;
     try {
-      chatWidget = buildChatSidebar(chatHandler, themeManager, rmRegistry);
+      chatWidget = buildChatSidebar({
+        model: chatHandler,
+        themeManager,
+        rmRegistry
+      });
       chatWidget.title.caption = 'Codestral Chat';
     } catch (e) {
       chatWidget = buildErrorWidget(themeManager);
diff --git a/style/base.css b/style/base.css
index e11f457..66a0e8b 100644
--- a/style/base.css
+++ b/style/base.css
@@ -3,3 +3,5 @@
 
     https://jupyterlab.readthedocs.io/en/stable/developer/css.html
 */
+
+@import url('@jupyter/chat/style/index.css');
diff --git a/yarn.lock b/yarn.lock
index fbbab0f..355781c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -782,15 +782,20 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@jupyter/chat@npm:^0.1.0":
-  version: 0.1.0
-  resolution: "@jupyter/chat@npm:0.1.0"
+"@jupyter/chat@npm:^0.5.0":
+  version: 0.5.0
+  resolution: "@jupyter/chat@npm:0.5.0"
   dependencies:
     "@emotion/react": ^11.10.5
     "@emotion/styled": ^11.10.5
-    "@jupyterlab/apputils": ^4.0.0
-    "@jupyterlab/rendermime": ^4.0.0
-    "@jupyterlab/ui-components": ^4.0.0
+    "@jupyter/react-components": ^0.15.2
+    "@jupyterlab/application": ^4.2.0
+    "@jupyterlab/apputils": ^4.3.0
+    "@jupyterlab/fileeditor": ^4.2.0
+    "@jupyterlab/notebook": ^4.2.0
+    "@jupyterlab/rendermime": ^4.2.0
+    "@jupyterlab/ui-components": ^4.2.0
+    "@lumino/commands": ^2.0.0
     "@lumino/disposable": ^2.0.0
     "@lumino/signaling": ^2.0.0
     "@mui/icons-material": ^5.11.0
@@ -798,11 +803,11 @@ __metadata:
     clsx: ^2.1.0
     react: ^18.2.0
     react-dom: ^18.2.0
-  checksum: d6e1b12022eec98b362758acc02fe63087d15330872b55fa3587ff6f59bf33b2cc8df40dc4383cf14b163259d66b2f90e0bc2e163d455a2df9376bc88f045f35
+  checksum: 0c935344e3cf8b60ded1df83c1b608f77becd7ea8c82c175a8588606c6c56a46525130b429b5acfaab441d9ccac9d478b25646bdb8aa3dfd1af82c8f372e07cf
   languageName: node
   linkType: hard
 
-"@jupyter/react-components@npm:^0.15.3":
+"@jupyter/react-components@npm:^0.15.2, @jupyter/react-components@npm:^0.15.3":
   version: 0.15.3
   resolution: "@jupyter/react-components@npm:0.15.3"
   dependencies:
@@ -839,20 +844,20 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@jupyterlab/application@npm:^4.0.0":
-  version: 4.2.1
-  resolution: "@jupyterlab/application@npm:4.2.1"
+"@jupyterlab/application@npm:^4.2.0":
+  version: 4.2.5
+  resolution: "@jupyterlab/application@npm:4.2.5"
   dependencies:
     "@fortawesome/fontawesome-free": ^5.12.0
-    "@jupyterlab/apputils": ^4.3.1
-    "@jupyterlab/coreutils": ^6.2.1
-    "@jupyterlab/docregistry": ^4.2.1
-    "@jupyterlab/rendermime": ^4.2.1
-    "@jupyterlab/rendermime-interfaces": ^3.10.1
-    "@jupyterlab/services": ^7.2.1
-    "@jupyterlab/statedb": ^4.2.1
-    "@jupyterlab/translation": ^4.2.1
-    "@jupyterlab/ui-components": ^4.2.1
+    "@jupyterlab/apputils": ^4.3.5
+    "@jupyterlab/coreutils": ^6.2.5
+    "@jupyterlab/docregistry": ^4.2.5
+    "@jupyterlab/rendermime": ^4.2.5
+    "@jupyterlab/rendermime-interfaces": ^3.10.5
+    "@jupyterlab/services": ^7.2.5
+    "@jupyterlab/statedb": ^4.2.5
+    "@jupyterlab/translation": ^4.2.5
+    "@jupyterlab/ui-components": ^4.2.5
     "@lumino/algorithm": ^2.0.1
     "@lumino/application": ^2.3.1
     "@lumino/commands": ^2.3.0
@@ -863,23 +868,23 @@ __metadata:
     "@lumino/properties": ^2.0.1
     "@lumino/signaling": ^2.1.2
     "@lumino/widgets": ^2.3.2
-  checksum: cc4b97fcfe81f31ffe437cd53370352e38ada94c39c9d60b595b0c0c4f195411653fd02af65717982d83084b18b2039dfc63d2d43f7ccda3fa0041294beeca44
+  checksum: c424ea191ef4da45eeae44e366e2b3cb23426cc72c0321226c83000c02b91fa7c4bc54978aa0b0e9416211cce9c17469204fc2b133cb2bec3d8896a0b2f75ce1
   languageName: node
   linkType: hard
 
-"@jupyterlab/apputils@npm:^4.0.0, @jupyterlab/apputils@npm:^4.3.1":
-  version: 4.3.1
-  resolution: "@jupyterlab/apputils@npm:4.3.1"
-  dependencies:
-    "@jupyterlab/coreutils": ^6.2.1
-    "@jupyterlab/observables": ^5.2.1
-    "@jupyterlab/rendermime-interfaces": ^3.10.1
-    "@jupyterlab/services": ^7.2.1
-    "@jupyterlab/settingregistry": ^4.2.1
-    "@jupyterlab/statedb": ^4.2.1
-    "@jupyterlab/statusbar": ^4.2.1
-    "@jupyterlab/translation": ^4.2.1
-    "@jupyterlab/ui-components": ^4.2.1
+"@jupyterlab/apputils@npm:^4.3.0, @jupyterlab/apputils@npm:^4.3.5":
+  version: 4.3.5
+  resolution: "@jupyterlab/apputils@npm:4.3.5"
+  dependencies:
+    "@jupyterlab/coreutils": ^6.2.5
+    "@jupyterlab/observables": ^5.2.5
+    "@jupyterlab/rendermime-interfaces": ^3.10.5
+    "@jupyterlab/services": ^7.2.5
+    "@jupyterlab/settingregistry": ^4.2.5
+    "@jupyterlab/statedb": ^4.2.5
+    "@jupyterlab/statusbar": ^4.2.5
+    "@jupyterlab/translation": ^4.2.5
+    "@jupyterlab/ui-components": ^4.2.5
     "@lumino/algorithm": ^2.0.1
     "@lumino/commands": ^2.3.0
     "@lumino/coreutils": ^2.1.2
@@ -892,7 +897,21 @@ __metadata:
     "@types/react": ^18.0.26
     react: ^18.2.0
     sanitize-html: ~2.12.1
-  checksum: 380d9059dd14ee47bb50a821515e0b4a92a2b60b6fed2bf15fb73b9192a2e95d1e6c97337f11d0c26870dba2dc89ee19604f068483df505e78d798510a61bf01
+  checksum: a2307657bfab1aff687eccfdb7a2c378a40989beea618ad6e5a811dbd250753588ea704a11250ddef42a551c8360717c1fe4c8827c5e2c3bfff1e84fc7fdc836
+  languageName: node
+  linkType: hard
+
+"@jupyterlab/attachments@npm:^4.2.5":
+  version: 4.2.5
+  resolution: "@jupyterlab/attachments@npm:4.2.5"
+  dependencies:
+    "@jupyterlab/nbformat": ^4.2.5
+    "@jupyterlab/observables": ^5.2.5
+    "@jupyterlab/rendermime": ^4.2.5
+    "@jupyterlab/rendermime-interfaces": ^3.10.5
+    "@lumino/disposable": ^2.1.2
+    "@lumino/signaling": ^2.1.2
+  checksum: f49fc50f9889de9c7da88e004ae4dd562460da050ff373c946ec54863fcf293dacb5e15de57dbfb0b01141648989a873188a00b898cbb491bbd6c50140a0392c
   languageName: node
   linkType: hard
 
@@ -937,19 +956,55 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@jupyterlab/codeeditor@npm:^4.2.1":
-  version: 4.2.1
-  resolution: "@jupyterlab/codeeditor@npm:4.2.1"
+"@jupyterlab/cells@npm:^4.2.5":
+  version: 4.2.5
+  resolution: "@jupyterlab/cells@npm:4.2.5"
   dependencies:
     "@codemirror/state": ^6.4.1
+    "@codemirror/view": ^6.26.0
     "@jupyter/ydoc": ^2.0.1
-    "@jupyterlab/apputils": ^4.3.1
-    "@jupyterlab/coreutils": ^6.2.1
-    "@jupyterlab/nbformat": ^4.2.1
-    "@jupyterlab/observables": ^5.2.1
-    "@jupyterlab/statusbar": ^4.2.1
-    "@jupyterlab/translation": ^4.2.1
-    "@jupyterlab/ui-components": ^4.2.1
+    "@jupyterlab/apputils": ^4.3.5
+    "@jupyterlab/attachments": ^4.2.5
+    "@jupyterlab/codeeditor": ^4.2.5
+    "@jupyterlab/codemirror": ^4.2.5
+    "@jupyterlab/coreutils": ^6.2.5
+    "@jupyterlab/documentsearch": ^4.2.5
+    "@jupyterlab/filebrowser": ^4.2.5
+    "@jupyterlab/nbformat": ^4.2.5
+    "@jupyterlab/observables": ^5.2.5
+    "@jupyterlab/outputarea": ^4.2.5
+    "@jupyterlab/rendermime": ^4.2.5
+    "@jupyterlab/services": ^7.2.5
+    "@jupyterlab/toc": ^6.2.5
+    "@jupyterlab/translation": ^4.2.5
+    "@jupyterlab/ui-components": ^4.2.5
+    "@lumino/algorithm": ^2.0.1
+    "@lumino/coreutils": ^2.1.2
+    "@lumino/domutils": ^2.0.1
+    "@lumino/dragdrop": ^2.1.4
+    "@lumino/messaging": ^2.0.1
+    "@lumino/polling": ^2.1.2
+    "@lumino/signaling": ^2.1.2
+    "@lumino/virtualdom": ^2.0.1
+    "@lumino/widgets": ^2.3.2
+    react: ^18.2.0
+  checksum: 6b2f84c0036dbc8808eb6f5057d07dae00d8000fac2f91568ca3f9b6abe30e6724d1be7ce53f085f6e8a93850817316f4e9e2c0e4fb81c3b29e104908a570d3b
+  languageName: node
+  linkType: hard
+
+"@jupyterlab/codeeditor@npm:^4.2.5":
+  version: 4.2.5
+  resolution: "@jupyterlab/codeeditor@npm:4.2.5"
+  dependencies:
+    "@codemirror/state": ^6.4.1
+    "@jupyter/ydoc": ^2.0.1
+    "@jupyterlab/apputils": ^4.3.5
+    "@jupyterlab/coreutils": ^6.2.5
+    "@jupyterlab/nbformat": ^4.2.5
+    "@jupyterlab/observables": ^5.2.5
+    "@jupyterlab/statusbar": ^4.2.5
+    "@jupyterlab/translation": ^4.2.5
+    "@jupyterlab/ui-components": ^4.2.5
     "@lumino/coreutils": ^2.1.2
     "@lumino/disposable": ^2.1.2
     "@lumino/dragdrop": ^2.1.4
@@ -957,13 +1012,13 @@ __metadata:
     "@lumino/signaling": ^2.1.2
     "@lumino/widgets": ^2.3.2
     react: ^18.2.0
-  checksum: c5c78558d950ff7b07902c68e550f44570503179c4e3e23f04b39fb87cf522b61202b8331e465388545e14bda2f15542c55da95bc86d4a4b26e0f74d8bd49aa8
+  checksum: 0b6f3f7a1fe02d2bb0b07571e03c6be645d58e182f3e1fcc5452e79dee8eab2097e13544eb461ff2bed72337bd335c539b8cb7cfe5f7bfd840163cc26d200c58
   languageName: node
   linkType: hard
 
-"@jupyterlab/codemirror@npm:^4.2.1":
-  version: 4.2.1
-  resolution: "@jupyterlab/codemirror@npm:4.2.1"
+"@jupyterlab/codemirror@npm:^4.2.5":
+  version: 4.2.5
+  resolution: "@jupyterlab/codemirror@npm:4.2.5"
   dependencies:
     "@codemirror/autocomplete": ^6.15.0
     "@codemirror/commands": ^6.3.3
@@ -986,11 +1041,11 @@ __metadata:
     "@codemirror/state": ^6.4.1
     "@codemirror/view": ^6.26.0
     "@jupyter/ydoc": ^2.0.1
-    "@jupyterlab/codeeditor": ^4.2.1
-    "@jupyterlab/coreutils": ^6.2.1
-    "@jupyterlab/documentsearch": ^4.2.1
-    "@jupyterlab/nbformat": ^4.2.1
-    "@jupyterlab/translation": ^4.2.1
+    "@jupyterlab/codeeditor": ^4.2.5
+    "@jupyterlab/coreutils": ^6.2.5
+    "@jupyterlab/documentsearch": ^4.2.5
+    "@jupyterlab/nbformat": ^4.2.5
+    "@jupyterlab/translation": ^4.2.5
     "@lezer/common": ^1.2.1
     "@lezer/generator": ^1.7.0
     "@lezer/highlight": ^1.2.0
@@ -999,27 +1054,27 @@ __metadata:
     "@lumino/disposable": ^2.1.2
     "@lumino/signaling": ^2.1.2
     yjs: ^13.5.40
-  checksum: b037409146ec5225664d29f17d3cd5abf1868ba83f17e61c3f9a87dfaa8112045819de5ede97e820867d7dcc19ffc3f09dddd9cd7ec5cf434ac48adef0ad6e5e
+  checksum: 6c612c861dbc6a6acdc1887e7dd25d5029d1a40cda20735fb3f009867e27aacd0e2d05e9b01c71b3a6f9a35218d881159954e679806b118df24d90565b9c16c4
   languageName: node
   linkType: hard
 
-"@jupyterlab/completer@npm:^4.0.0":
-  version: 4.2.1
-  resolution: "@jupyterlab/completer@npm:4.2.1"
+"@jupyterlab/completer@npm:^4.2.0":
+  version: 4.2.5
+  resolution: "@jupyterlab/completer@npm:4.2.5"
   dependencies:
     "@codemirror/state": ^6.4.1
     "@codemirror/view": ^6.26.0
     "@jupyter/ydoc": ^2.0.1
-    "@jupyterlab/apputils": ^4.3.1
-    "@jupyterlab/codeeditor": ^4.2.1
-    "@jupyterlab/codemirror": ^4.2.1
-    "@jupyterlab/coreutils": ^6.2.1
-    "@jupyterlab/rendermime": ^4.2.1
-    "@jupyterlab/services": ^7.2.1
-    "@jupyterlab/settingregistry": ^4.2.1
-    "@jupyterlab/statedb": ^4.2.1
-    "@jupyterlab/translation": ^4.2.1
-    "@jupyterlab/ui-components": ^4.2.1
+    "@jupyterlab/apputils": ^4.3.5
+    "@jupyterlab/codeeditor": ^4.2.5
+    "@jupyterlab/codemirror": ^4.2.5
+    "@jupyterlab/coreutils": ^6.2.5
+    "@jupyterlab/rendermime": ^4.2.5
+    "@jupyterlab/services": ^7.2.5
+    "@jupyterlab/settingregistry": ^4.2.5
+    "@jupyterlab/statedb": ^4.2.5
+    "@jupyterlab/translation": ^4.2.5
+    "@jupyterlab/ui-components": ^4.2.5
     "@lumino/algorithm": ^2.0.1
     "@lumino/coreutils": ^2.1.2
     "@lumino/disposable": ^2.1.2
@@ -1027,13 +1082,13 @@ __metadata:
     "@lumino/messaging": ^2.0.1
     "@lumino/signaling": ^2.1.2
     "@lumino/widgets": ^2.3.2
-  checksum: ac4828b57601c42b6261a51b9c7aa8dddcbd0ce02ee56d344ba4434e3218e19ce303b7cb26582dc5cd3db5789d0359d2810aedbf15ba1089590d1579ce4d89d5
+  checksum: e16d5001b2ffde6e51cf5b5221cb9f812e09142fdb3166204f9fbb1e51d3f814707bf5c3955b3378c968c25cbe39ceedf4221f68d8f75999908621b8e28f98e8
   languageName: node
   linkType: hard
 
-"@jupyterlab/coreutils@npm:^6.2.1":
-  version: 6.2.1
-  resolution: "@jupyterlab/coreutils@npm:6.2.1"
+"@jupyterlab/coreutils@npm:^6.2.5":
+  version: 6.2.5
+  resolution: "@jupyterlab/coreutils@npm:6.2.5"
   dependencies:
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