diff --git a/build/preview-comment/index.js b/build/preview-comment/index.js
index b381e030..543b2abc 100644
--- a/build/preview-comment/index.js
+++ b/build/preview-comment/index.js
@@ -20780,6 +20780,7 @@ function commentInput() {
 }
 executeAction(commentAction);
 async function commentAction(input = commentInput()) {
+    (0,core.warning)('Expo publish is deprecated, but will be suported until 2024. Read more: https://blog.expo.dev/sunsetting-expo-publish-and-classic-updates-6cb9cd295378');
     const project = await projectInfo(input.project);
     if (!project.owner) {
         project.owner = await projectOwner();
diff --git a/preview-comment/README.md b/preview-comment/README.md
index 1ad3052f..0ed00794 100644
--- a/preview-comment/README.md
+++ b/preview-comment/README.md
@@ -32,6 +32,8 @@
 
 <br />
 
+> Expo publish is deprecated, but will be supported until 2024. ([read more](https://blog.expo.dev/sunsetting-expo-publish-and-classic-updates-6cb9cd295378))
+
 ## What's inside?
 
 This (sub)action allows you to comment on pull requests containing Expo QR codes.
diff --git a/src/actions/preview-comment.ts b/src/actions/preview-comment.ts
index 8a504337..ce729c41 100644
--- a/src/actions/preview-comment.ts
+++ b/src/actions/preview-comment.ts
@@ -1,4 +1,4 @@
-import { getBooleanInput, getInput, setOutput, info } from '@actions/core';
+import { getBooleanInput, getInput, setOutput, info, warning } from '@actions/core';
 
 import { projectDeepLink, projectInfo, projectLink, projectOwner, projectQR } from '../expo';
 import { createIssueComment, pullContext } from '../github';
@@ -26,6 +26,10 @@ export function commentInput() {
 executeAction(commentAction);
 
 export async function commentAction(input = commentInput()) {
+  warning(
+    'Expo publish is deprecated, but will be suported until 2024. Read more: https://blog.expo.dev/sunsetting-expo-publish-and-classic-updates-6cb9cd295378'
+  );
+
   const project = await projectInfo(input.project);
   if (!project.owner) {
     project.owner = await projectOwner();
diff --git a/tests/actions/preview-comment.test.ts b/tests/actions/preview-comment.test.ts
index 354f2649..808209c1 100644
--- a/tests/actions/preview-comment.test.ts
+++ b/tests/actions/preview-comment.test.ts
@@ -63,6 +63,13 @@ describe(commentAction, () => {
     jest.mocked(expo.projectOwner).mockResolvedValue('fakeuser');
   });
 
+  it('warns users for deprecated publish', async () => {
+    await commentAction({ ...input });
+    expect(core.warning).toBeCalledWith(
+      'Expo publish is deprecated, but will be suported until 2024. Read more: https://blog.expo.dev/sunsetting-expo-publish-and-classic-updates-6cb9cd295378'
+    );
+  });
+
   it('resolves project info by project path', async () => {
     await commentAction({ ...input, project: 'fake/path' });
     expect(expo.projectInfo).toBeCalledWith('fake/path');