diff --git a/src/05-queue-deque/palindrome-checker.js b/src/05-queue-deque/palindrome-checker.js
index 36b79808..a687c83f 100644
--- a/src/05-queue-deque/palindrome-checker.js
+++ b/src/05-queue-deque/palindrome-checker.js
@@ -1,4 +1,5 @@
-const Deque = require('./deque.js');
+const DequeModule = require('./deque.js');
+const Deque = DequeModule.default || DequeModule;
 
 function isPalindrome(word) {
 
@@ -26,4 +27,4 @@ function isPalindrome(word) {
 // Test the palindrome checker
 console.log(isPalindrome("racecar")); // Output: true
 
-module.exports = isPalindrome;
\ No newline at end of file
+module.exports = isPalindrome;
diff --git a/src/11-heap/heap-sort.js b/src/11-heap/heap-sort.js
index e61982bb..f9821393 100644
--- a/src/11-heap/heap-sort.js
+++ b/src/11-heap/heap-sort.js
@@ -1,6 +1,7 @@
 // src/11-heap/heap-sort.js
 
-const Comparator = require('../10-tree/comparator.js');
+const ComparatorModule = require('../10-tree/comparator.js');
+const Comparator = ComparatorModule.default || ComparatorModule;
 
 /**
  * Heapify the array.
@@ -54,4 +55,4 @@ const HeapSort = (array, compareFn = Comparator.defaultCompareFn) => {
   }
 }
 
-module.exports = HeapSort;
\ No newline at end of file
+module.exports = HeapSort;