diff --git a/.changeset/quiet-flies-march.md b/.changeset/quiet-flies-march.md
new file mode 100644
index 00000000..c3ae79ba
--- /dev/null
+++ b/.changeset/quiet-flies-march.md
@@ -0,0 +1,5 @@
+---
+"@openai/agents-core": patch
+---
+
+fix(shims): Bind crypto to randomUUID
diff --git a/packages/agents-core/src/shims/shims-browser.ts b/packages/agents-core/src/shims/shims-browser.ts
index 993e3d28..8b8a6b4b 100644
--- a/packages/agents-core/src/shims/shims-browser.ts
+++ b/packages/agents-core/src/shims/shims-browser.ts
@@ -61,7 +61,7 @@ export class BrowserEventEmitter<
 
 export { BrowserEventEmitter as RuntimeEventEmitter };
 
-export const randomUUID = crypto.randomUUID;
+export const randomUUID = crypto.randomUUID.bind(crypto);
 export const Readable = class Readable {
   constructor() {}
   pipeTo(