diff --git a/examples/rss-reader/src/index.tsx b/examples/rss-reader/src/index.tsx
index 2b269cb81..5ff542b3f 100644
--- a/examples/rss-reader/src/index.tsx
+++ b/examples/rss-reader/src/index.tsx
@@ -27,7 +27,7 @@ function decodeEntities(value: string): string {
 
   return value.replace(/&(#x?[0-9a-fA-F]+|[a-zA-Z]+);/g, (match, entity: string) => {
     if (entity.startsWith('#x')) {
-      const codePoint = Number.parseInt(entity.slice(2), 16);
+      const codePoint = Number.parseInt(entity.slice(2, 10), 16);
       return Number.isFinite(codePoint) ? String.fromCodePoint(codePoint) : match;
     }
 
diff --git a/packages/ui/src/MultiSelect.ts b/packages/ui/src/MultiSelect.ts
index b4116418f..327e1eee2 100644
--- a/packages/ui/src/MultiSelect.ts
+++ b/packages/ui/src/MultiSelect.ts
@@ -30,7 +30,7 @@ export class MultiSelect extends Widget {
     }
 
     get selectedOptions(): MultiSelectOption[] {
-        return [...this._checked].sort().map(i => this._options[i]);
+        return [...this._checked].sort((a, b) => a - b).map(i => this._options[i]);
     }
     selectNext(): void { if (this._options.length === 0) return; let n = this._cursorIndex + 1; while (n < this._options.length && this._options[n].disabled) n++; if (n < this._options.length) { this._cursorIndex = n; this.markDirty(); } }
     selectPrev(): void { if (this._options.length === 0) return; let n = this._cursorIndex - 1; while (n >= 0 && this._options[n].disabled) n--; if (n >= 0) { this._cursorIndex = n; this.markDirty(); } }
diff --git a/packages/ui/src/prompts.ts b/packages/ui/src/prompts.ts
index b92bb28ba..b248a6ac4 100644
--- a/packages/ui/src/prompts.ts
+++ b/packages/ui/src/prompts.ts
@@ -113,7 +113,7 @@ async function promptSelect<T = string>(options: SelectPromptOptions<T>): Promis
                     return;
                 }
                 const n = parseInt(trimmed, 10);
-                if (!isNaN(n) && n >= 1 && n <= choices.length) {
+                if (!Number.isNaN(n) && n >= 1 && n <= choices.length) {
                     rl.close();
                     resolve(choices[n - 1].value);
                     return;