diff --git a/packages/core/src/bundle/hooks/usePostMessage/usePostMessage.js b/packages/core/src/bundle/hooks/usePostMessage/usePostMessage.js
index c28519a4..6814f5d2 100644
--- a/packages/core/src/bundle/hooks/usePostMessage/usePostMessage.js
+++ b/packages/core/src/bundle/hooks/usePostMessage/usePostMessage.js
@@ -17,12 +17,17 @@ import { useEffect, useRef } from 'react';
 export const usePostMessage = (origin, callback) => {
   const internalCallbackRef = useRef(callback);
   internalCallbackRef.current = callback;
+  const internalOriginRef = useRef(origin);
+  internalOriginRef.current = origin;
   useEffect(() => {
     const onMessage = (event) => {
-      if (
-        (Array.isArray(origin) && (!origin.includes(event.origin) || !origin.includes('*'))) ||
-        (event.origin !== origin && origin !== '*')
-      )
+      if (Array.isArray(internalOriginRef.current)) {
+        if (
+          !internalOriginRef.current.includes(event.origin) &&
+          !internalOriginRef.current.includes('*')
+        )
+          return;
+      } else if (internalOriginRef.current !== '*' && event.origin !== internalOriginRef.current)
         return;
       internalCallbackRef.current(event.data, event);
     };
@@ -30,11 +35,9 @@ export const usePostMessage = (origin, callback) => {
     return () => window.removeEventListener('message', onMessage);
   }, []);
   const postMessage = (message) => {
-    if (Array.isArray(origin)) {
-      origin.forEach((origin) => window.postMessage(message, origin));
-      return;
-    }
-    window.postMessage(message, origin);
+    if (Array.isArray(internalOriginRef.current))
+      return internalOriginRef.current.forEach((origin) => window.postMessage(message, origin));
+    window.postMessage(message, internalOriginRef.current);
   };
   return postMessage;
 };
diff --git a/packages/core/src/hooks/usePostMessage/usePostMessage.test.ts b/packages/core/src/hooks/usePostMessage/usePostMessage.test.ts
new file mode 100644
index 00000000..eb2fe489
--- /dev/null
+++ b/packages/core/src/hooks/usePostMessage/usePostMessage.test.ts
@@ -0,0 +1,130 @@
+import { act, renderHook } from '@testing-library/react';
+
+import { createTrigger, renderHookServer } from '@/tests';
+
+import { usePostMessage } from './usePostMessage';
+
+const trigger = createTrigger<string, (event: Event) => void>();
+const mockPostMessage = vi.fn();
+const mockAddEventListener = vi.fn();
+const mockRemoveEventListener = vi.fn();
+
+beforeEach(() => {
+  vi.clearAllMocks();
+  trigger.clear();
+
+  Object.assign(window, {
+    postMessage: mockPostMessage,
+    addEventListener: (type: string, callback: (event: Event) => void) => {
+      mockAddEventListener(type, callback);
+      trigger.add(type, callback);
+    },
+    removeEventListener: (type: string, callback: (event: Event) => void) => {
+      mockRemoveEventListener(type, callback);
+      if (trigger.get(type) === callback) trigger.delete(type);
+    },
+    dispatchEvent: (event: Event) => {
+      trigger.callback(event.type, event);
+      return true;
+    }
+  });
+});
+
+it('Should use postMessage', () => {
+  const { result } = renderHook(() => usePostMessage('*', vi.fn()));
+  expect(result.current).toBeTypeOf('function');
+});
+
+it('Should use postMessage on server side', () => {
+  const { result } = renderHookServer(() => usePostMessage('*', vi.fn()));
+  expect(result.current).toBeTypeOf('function');
+});
+
+it('Should postMessage when handler is called', () => {
+  const { result } = renderHook(() => usePostMessage('*', vi.fn()));
+
+  act(() => {
+    result.current({ data: 'test-message', origin: 'origin1' });
+  });
+
+  expect(mockPostMessage).toHaveBeenCalledOnce();
+  expect(mockPostMessage).toHaveBeenCalledWith({ data: 'test-message', origin: 'origin1' }, '*');
+});
+
+it('Should filter by origin', () => {
+  const callback = vi.fn();
+  renderHook(() => usePostMessage('allowed-origin', callback));
+
+  act(() => {
+    window.dispatchEvent(
+      new MessageEvent('message', { data: 'test-message', origin: 'blocked-origin' })
+    );
+  });
+  expect(callback).not.toHaveBeenCalled();
+
+  act(() => {
+    window.dispatchEvent(
+      new MessageEvent('message', { data: 'test-message', origin: 'allowed-origin' })
+    );
+  });
+
+  expect(callback).toHaveBeenCalledOnce();
+  expect(callback).toHaveBeenCalledWith(
+    'test-message',
+    expect.objectContaining({ data: 'test-message', origin: 'allowed-origin' })
+  );
+});
+
+it('Should add and remove event listener on mount and unmount', () => {
+  const callback = vi.fn();
+  const { unmount } = renderHook(() => usePostMessage('*', callback));
+
+  expect(mockAddEventListener).toHaveBeenCalledWith('message', expect.any(Function));
+
+  unmount();
+
+  expect(mockRemoveEventListener).toHaveBeenCalledWith('message', expect.any(Function));
+});
+
+it('Should filter by array of origins', () => {
+  const callback = vi.fn();
+  renderHook(() => usePostMessage(['origin1', 'origin2'], callback));
+
+  act(() => {
+    window.dispatchEvent(new MessageEvent('message', { data: 'm', origin: 'origin3' }));
+  });
+  expect(callback).not.toHaveBeenCalled();
+
+  act(() => {
+    window.dispatchEvent(new MessageEvent('message', { data: 'm', origin: 'origin2' }));
+  });
+
+  expect(callback).toHaveBeenCalledOnce();
+  expect(callback).toHaveBeenCalledWith(
+    'm',
+    expect.objectContaining({ data: 'm', origin: 'origin2' })
+  );
+});
+
+it('Should accept "*" inside array origins', () => {
+  const callback = vi.fn();
+  renderHook(() => usePostMessage(['origin1', '*'], callback));
+
+  act(() => {
+    window.dispatchEvent(new MessageEvent('message', { data: 'm', origin: 'other' }));
+  });
+
+  expect(callback).toHaveBeenCalledOnce();
+});
+
+it('Should post to each origin when origin is array', () => {
+  const { result } = renderHook(() => usePostMessage(['a', 'b'], vi.fn()));
+
+  act(() => {
+    result.current('payload');
+  });
+
+  expect(mockPostMessage).toHaveBeenCalledTimes(2);
+  expect(mockPostMessage).toHaveBeenCalledWith('payload', 'a');
+  expect(mockPostMessage).toHaveBeenCalledWith('payload', 'b');
+});
diff --git a/packages/core/src/hooks/usePostMessage/usePostMessage.ts b/packages/core/src/hooks/usePostMessage/usePostMessage.ts
index ee0ad56e..82337b37 100644
--- a/packages/core/src/hooks/usePostMessage/usePostMessage.ts
+++ b/packages/core/src/hooks/usePostMessage/usePostMessage.ts
@@ -23,13 +23,18 @@ export const usePostMessage = <Message>(
 ): UsePostMessageReturn<Message> => {
   const internalCallbackRef = useRef(callback);
   internalCallbackRef.current = callback;
+  const internalOriginRef = useRef(origin);
+  internalOriginRef.current = origin;
 
   useEffect(() => {
     const onMessage = (event: MessageEvent<Message>) => {
-      if (
-        (Array.isArray(origin) && (!origin.includes(event.origin) || !origin.includes('*'))) ||
-        (event.origin !== origin && origin !== '*')
-      )
+      if (Array.isArray(internalOriginRef.current)) {
+        if (
+          !internalOriginRef.current.includes(event.origin) &&
+          !internalOriginRef.current.includes('*')
+        )
+          return;
+      } else if (internalOriginRef.current !== '*' && event.origin !== internalOriginRef.current)
         return;
 
       internalCallbackRef.current(event.data as Message, event);
@@ -40,12 +45,10 @@ export const usePostMessage = <Message>(
   }, []);
 
   const postMessage = (message: Message) => {
-    if (Array.isArray(origin)) {
-      origin.forEach((origin) => window.postMessage(message, origin));
-      return;
-    }
+    if (Array.isArray(internalOriginRef.current))
+      return internalOriginRef.current.forEach((origin) => window.postMessage(message, origin));
 
-    window.postMessage(message, origin);
+    window.postMessage(message, internalOriginRef.current);
   };
 
   return postMessage;