diff --git a/electron/main.cjs b/electron/main.cjs
index c29c697..56ee751 100644
--- a/electron/main.cjs
+++ b/electron/main.cjs
@@ -55,6 +55,8 @@ function createWindow() {
     webPreferences: {
       contextIsolation: true,
       nodeIntegration: false,
+      // 한글 IME 첫 글자 중복 입력 방지 — Chromium 맞춤법 검사기가 조합을 방해하는 Electron 알려진 버그 회피
+      spellcheck: false,
     },
   })
   if (s?.maximized) win.maximize()