diff --git a/src/BTree.js b/src/BTree.js
index d506cdc..03636d0 100644
--- a/src/BTree.js
+++ b/src/BTree.js
@@ -400,4 +400,4 @@ BTree.COMPARISON_EQUAL = 0;
 BTree.COMPARISON_LESSER = -1;
 BTree.COMPARISON_GREATER = 1;
 
-global.BTree = BTree;
+globalThis.BTree = BTree;
diff --git a/src/HashTable.js b/src/HashTable.js
index 339bc4d..69a54d1 100644
--- a/src/HashTable.js
+++ b/src/HashTable.js
@@ -421,4 +421,4 @@ class HashTable extends mix(Object, GenericCollectionTrait) {
     }
 }
 
-global.HashTable = HashTable;
+globalThis.HashTable = HashTable;
diff --git a/src/LinkedList.js b/src/LinkedList.js
index 0113ef3..1535478 100644
--- a/src/LinkedList.js
+++ b/src/LinkedList.js
@@ -180,4 +180,4 @@ class LinkedList extends mix(Object, GenericCollectionTrait) {
     }
 }
 
-global.LinkedList = LinkedList;
+globalThis.LinkedList = LinkedList;
diff --git a/src/PriorityQueue.js b/src/PriorityQueue.js
index 86c0f8b..23ef034 100644
--- a/src/PriorityQueue.js
+++ b/src/PriorityQueue.js
@@ -263,4 +263,4 @@ class PriorityQueue extends mix(Object, GenericCollectionTrait) {
     }
 }
 
-global.PriorityQueue = PriorityQueue;
+globalThis.PriorityQueue = PriorityQueue;