diff --git a/src/app/playground/page.tsx b/src/app/playground/page.tsx
index 05df209..94ba1db 100644
--- a/src/app/playground/page.tsx
+++ b/src/app/playground/page.tsx
@@ -65,6 +65,10 @@ export default function PlaygroundPage() {
           webSocketRef.current.close();
           webSocketRef.current = null;
         }
+        if (languageClientRef.current) {
+          languageClientRef.current.stop();
+          languageClientRef.current = null;
+        }
         connectToLanguageServer(language, webSocketRef).then(
           (languageClient) => {
             languageClientRef.current = languageClient;