diff --git a/THIRD_PARTY_NOTICES.md b/THIRD_PARTY_NOTICES.md
index 21bfde8..9b885e9 100644
--- a/THIRD_PARTY_NOTICES.md
+++ b/THIRD_PARTY_NOTICES.md
@@ -67,7 +67,7 @@ eRAW itself is distributed under GPL-3.0-or-later. Dependency copyrights remain
 | source-map-js | 1.2.1 | development | BSD-3-Clause |
 | tinyglobby | 0.2.17 | development | MIT |
 | tslib | 2.3.0 | runtime | 0BSD |
-| typescript | 5.8.3 | development | Apache-2.0 |
+| typescript | 6.0.3 | development | Apache-2.0 |
 | vite | 8.2.1 | development | MIT |
 | zrender | 6.1.0 | runtime | BSD-3-Clause |
 
diff --git a/package-lock.json b/package-lock.json
index 680990c..4ff84ad 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,7 +17,7 @@
       },
       "devDependencies": {
         "@tauri-apps/cli": "^2.0.0",
-        "typescript": "~5.8.0",
+        "typescript": "~6.0.3",
         "vite": "^8.2.1"
       }
     },
@@ -1040,9 +1040,9 @@
       "license": "0BSD"
     },
     "node_modules/typescript": {
-      "version": "5.8.3",
-      "resolved": "https://registry.npmmirror.com/typescript/-/typescript-5.8.3.tgz",
-      "integrity": "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==",
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/typescript/-/typescript-6.0.3.tgz",
+      "integrity": "sha512-y2TvuxSZPDyQakkFRPZHKFm+KKVqIisdg9/CZwm9ftvKXLP8NRWj38/ODjNbr43SsoXqNuAisEf1GdCxqWcdBw==",
       "dev": true,
       "license": "Apache-2.0",
       "bin": {
diff --git a/package.json b/package.json
index adb484c..3702b6d 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
   },
   "devDependencies": {
     "@tauri-apps/cli": "^2.0.0",
-    "typescript": "~5.8.0",
+    "typescript": "~6.0.3",
     "vite": "^8.2.1"
   }
 }
diff --git a/src/app.ts b/src/app.ts
index e55ff20..921420f 100644
--- a/src/app.ts
+++ b/src/app.ts
@@ -1018,7 +1018,7 @@ export class ErawApp {
     this.get("empty-open-button").addEventListener("click", () => void this.openFile());
     this.get<HTMLButtonElement>("export-button").addEventListener("click", (event) => {
       event.stopPropagation();
-      this.setExportMenuOpen(this.get("export-popover").hidden);
+      this.setExportMenuOpen(Boolean(this.get("export-popover").hidden));
     });
     this.root.querySelectorAll<HTMLButtonElement>("[data-export-target]").forEach((button) => {
       button.addEventListener("click", () => {
@@ -1044,7 +1044,7 @@ export class ErawApp {
     });
     this.get("language-button").addEventListener("click", (event) => {
       event.stopPropagation();
-      this.setLanguageMenuOpen(this.get("language-popover").hidden);
+      this.setLanguageMenuOpen(Boolean(this.get("language-popover").hidden));
     });
     this.root.querySelectorAll<HTMLButtonElement>("[data-language-value]").forEach((button) => {
       button.addEventListener("click", () => {
@@ -1054,7 +1054,7 @@ export class ErawApp {
     });
     this.get("theme-button").addEventListener("click", (event) => {
       event.stopPropagation();
-      this.setThemeMenuOpen(this.get("theme-popover").hidden);
+      this.setThemeMenuOpen(Boolean(this.get("theme-popover").hidden));
     });
     this.root.querySelectorAll<HTMLButtonElement>("[data-theme-value]").forEach((button) => button.addEventListener("click", () => {
       this.setTheme(button.dataset.themeValue as AppTheme);
@@ -1123,7 +1123,7 @@ export class ErawApp {
     });
     this.get("about-button").addEventListener("click", (event) => {
       event.stopPropagation();
-      this.setUtilityMenuOpen(this.get("utility-popover").hidden);
+      this.setUtilityMenuOpen(Boolean(this.get("utility-popover").hidden));
     });
     this.get("help-menu-item").addEventListener("click", () => {
       this.setUtilityMenuOpen(false);
diff --git a/src/image-capture.ts b/src/image-capture.ts
index 22bfa7c..a4689f7 100644
--- a/src/image-capture.ts
+++ b/src/image-capture.ts
@@ -176,7 +176,7 @@ export async function renderPreviewCanvas(
       );
       context.putImageData(
         new ImageData(
-          new Uint8ClampedArray(bytes.buffer, bytes.byteOffset, bytes.byteLength),
+          new Uint8ClampedArray(bytes),
           CAPTURE_TILE_SIZE,
           CAPTURE_TILE_SIZE,
         ),