diff --git a/src/extension.ts b/src/extension.ts
index 3d29a99..0afa66b 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -13,6 +13,7 @@ import { createOutputChannel, onDidChangeConfiguration, registerCommand } from '
 import { registerLanguageStatusItem, updateStatus } from './common/status';
 
 let lsClient: LanguageClient | undefined;
+let watcher: vscode.FileSystemWatcher | undefined;
 export async function activate(context: vscode.ExtensionContext): Promise<void> {
     // This is required to get server name and module. This should be
     // the first thing that we do in this extension.
@@ -44,6 +45,18 @@ export async function activate(context: vscode.ExtensionContext): Promise<void>
         }
     };
 
+    const workspaceFolder = vscode.workspace.workspaceFolders?.[0];
+
+    if (workspaceFolder) {
+        const fullPath = `${workspaceFolder.uri.fsPath}/pyproject.toml`;
+        watcher = vscode.workspace.createFileSystemWatcher(fullPath);
+
+        watcher.onDidChange((uri) => {
+            console.log('pyproject.toml changed');
+            vscode.commands.executeCommand('mypy-type-checker.restart', uri.fsPath);
+        });
+    }
+
     context.subscriptions.push(
         onDidChangePythonInterpreter(async () => {
             await runServer();