diff --git a/src/helpers/randomizeElements.ts b/src/helpers/randomizeElements.ts
index 441f355..4c249ec 100644
--- a/src/helpers/randomizeElements.ts
+++ b/src/helpers/randomizeElements.ts
@@ -2,7 +2,7 @@ export function randomizeElements<T>(arr: T[]): T[] {
     const result: T[] = [...arr];
     for (let i: number = result.length - 1; i > 0; i--) {
         const j: number = Math.floor(Math.random() * (i + 1));
-        [result[i], result[j]] = [result[j], result[i]];
+        [result[i]!, result[j]!] = [result[j]!, result[i]!];
     }
     return result.slice(0, 100);
 }
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