diff --git a/src/storage/object/get.js b/src/storage/object/get.js
index cf17df94..04923694 100644
--- a/src/storage/object/get.js
+++ b/src/storage/object/get.js
@@ -36,7 +36,10 @@ export default async function getObject(env, { bucket, org, key }, head = false)
         status: resp.$metadata.httpStatusCode,
         contentType: resp.ContentType,
         contentLength: resp.ContentLength,
-        metadata: resp.Metadata,
+        metadata: {
+          ...resp.Metadata,
+          LastModified: resp.LastModified,
+        },
         etag: resp.ETag,
       };
     } catch (e) {
@@ -56,7 +59,10 @@ export default async function getObject(env, { bucket, org, key }, head = false)
     status: resp.status,
     contentType: resp.headers.get('content-type'),
     contentLength: resp.headers.get('content-length'),
-    metadata: Metadata,
+    metadata: {
+      ...Metadata,
+      LastModified: resp.headers.get('last-modified'),
+    },
     etag: resp.headers.get('etag'),
   };
 }
diff --git a/src/utils/daResp.js b/src/utils/daResp.js
index c52ac4fb..04f75b06 100644
--- a/src/utils/daResp.js
+++ b/src/utils/daResp.js
@@ -29,8 +29,8 @@ export default function daResp({
     headers.append('X-da-id', metadata.id);
   }
 
-  if (metadata?.timestamp) {
-    headers.append('Last-Modified', new Date(parseInt(metadata.timestamp, 10)).toUTCString());
+  if (metadata?.LastModified) {
+    headers.append('Last-Modified', new Date(metadata.LastModified).toUTCString());
   }
 
   if (ctx?.aclCtx && status < 500) {
diff --git a/test/storage/object/get.test.js b/test/storage/object/get.test.js
index 381f531c..ec3018b2 100644
--- a/test/storage/object/get.test.js
+++ b/test/storage/object/get.test.js
@@ -37,6 +37,7 @@ describe('Get Object', () => {
     const Body = Buffer.from('<p>hello world</p>');
     const ContentType = 'text/html';
     const ContentLength = Body.length;
+    const LastModified = new Date().toISOString
     const Metadata = { foo: 'bar' };
     const ETag = 'etag123';
     s3Mock
@@ -49,6 +50,7 @@ describe('Get Object', () => {
         ContentType,
         ContentLength,
         Metadata,
+        LastModified,
         ETag,
         $metadata: { httpStatusCode: 200 },
       });
@@ -56,7 +58,7 @@ describe('Get Object', () => {
     assert.strictEqual(resp.status, 200);
     assert.strictEqual(resp.contentType, ContentType);
     assert.strictEqual(resp.contentLength, ContentLength);
-    assert.deepStrictEqual(resp.metadata, Metadata);
+    assert.deepStrictEqual(resp.metadata, { ...Metadata, LastModified });
     assert.strictEqual(resp.etag, ETag);
     assert.deepStrictEqual(resp.body, Body);
   });
@@ -75,6 +77,7 @@ describe('Get Object', () => {
     );
 
     const savedFetch = globalThis.fetch;
+    const lastModified = new Date().toISOString();
     try {
       globalThis.fetch = async (url, opts) => {
         called = true;
@@ -87,6 +90,7 @@ describe('Get Object', () => {
               if (name === 'content-type') return 'text/html';
               if (name === 'content-length') return '123';
               if (name === 'etag') return 'etag456';
+              if (name === 'last-modified') return lastModified;
               return null;
             },
             forEach: (cb) => {
@@ -100,7 +104,7 @@ describe('Get Object', () => {
       assert.strictEqual(resp.status, 200);
       assert.strictEqual(resp.contentType, 'text/html');
       assert.strictEqual(resp.contentLength, '123');
-      assert.deepStrictEqual(resp.metadata, { foo: 'bar' });
+      assert.deepStrictEqual(resp.metadata, { foo: 'bar', LastModified: lastModified });
       assert.strictEqual(resp.etag, 'etag456');
       assert.strictEqual(resp.body, '');
       assert(called, 'fetch should be called');
diff --git a/test/utils/daResp.test.js b/test/utils/daResp.test.js
index dde77221..16e2a083 100644
--- a/test/utils/daResp.test.js
+++ b/test/utils/daResp.test.js
@@ -19,7 +19,7 @@ describe('DA Resp', () => {
     const aclCtx = { actionSet: ['read', 'write'], pathLookup: new Map() };
     const ctx = { key: 'foo/bar.html', aclCtx };
     const body = 'foobar';
-    const metadata = { id: '1234', timestamp: '1719235200000' };
+    const metadata = { id: '1234', LastModified: '2024-06-24T13:20:00.000Z' };
 
     const resp = daResp({status: 200, body, contentType: 'text/plain', contentLength: 777, metadata}, ctx);
     assert.strictEqual(body, await resp.text());