diff --git a/src/index.ts b/src/index.ts
index b4a9b17..5c162a0 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -4,6 +4,7 @@ export * from './base'
 
 // ref: https://github.com/tc39/proposal-global
 const getGlobal = function () {
+  if (typeof globalThis !== 'undefined') { return globalThis }
   if (typeof self !== 'undefined') { return self }
   if (typeof window !== 'undefined') { return window }
   if (typeof global !== 'undefined') { return global }