diff --git a/app/src/config/about.ts b/app/src/config/about.ts
index b58e73e32..0da63cf2e 100644
--- a/app/src/config/about.ts
+++ b/app/src/config/about.ts
@@ -256,7 +256,7 @@ ${checkUpdateHTML}
             const passwordDialog = new Dialog({
                 title: "🔑 " + window.siyuan.languages.key,
                 content: `<div class="b3-dialog__content">
-    <textarea style="resize: vertical;" class="b3-text-field fn__block" placeholder="${window.siyuan.languages.keyPlaceholder}"></textarea>
+    <textarea spellcheck="false" style="resize: vertical;" class="b3-text-field fn__block" placeholder="${window.siyuan.languages.keyPlaceholder}"></textarea>
 </div>
 <div class="b3-dialog__action">
     <button class="b3-button b3-button--cancel">${window.siyuan.languages.cancel}</button><div class="fn__space"></div>
diff --git a/app/src/mobile/settings/about.ts b/app/src/mobile/settings/about.ts
index a40d35f7c..21b5e780c 100644
--- a/app/src/mobile/settings/about.ts
+++ b/app/src/mobile/settings/about.ts
@@ -163,7 +163,7 @@ export const initAbout = () => {
                         const passwordDialog = new Dialog({
                             title: "🔑 " + window.siyuan.languages.key,
                             content: `<div class="b3-dialog__content">
-    <textarea style="resize: vertical;"  class="b3-text-field fn__block" placeholder="${window.siyuan.languages.keyPlaceholder}"></textarea>
+    <textarea spellcheck="false" style="resize: vertical;"  class="b3-text-field fn__block" placeholder="${window.siyuan.languages.keyPlaceholder}"></textarea>
 </div>
 <div class="b3-dialog__action">
     <button class="b3-button b3-button--cancel">${window.siyuan.languages.cancel}</button><div class="fn__space"></div>