diff --git a/media_downloader.py b/media_downloader.py
index e2bca79..3b500e3 100644
--- a/media_downloader.py
+++ b/media_downloader.py
@@ -38,7 +38,7 @@ def _get_media_meta(media_obj: object, _type: str) -> Tuple[str, str]:
             THIS_DIR,
             _type,
             "voice_{}.{}".format(
-                dt.fromtimestamp(media_obj.date).isoformat(), file_format
+                dt.utcfromtimestamp(media_obj.date).isoformat(), file_format
             ),
         )
     elif _type == "photo":
diff --git a/tests/test_media_downloader.py b/tests/test_media_downloader.py
index 9134ee8..ce969db 100644
--- a/tests/test_media_downloader.py
+++ b/tests/test_media_downloader.py
@@ -85,7 +85,7 @@ class MockClient:
 
     def download_media(self, *args, **kwargs):
         assert "AwADBQADbwAD2oTRVeHe5eXRFftfAg", args[0]
-        assert "/root/project/voice/voice_2019-07-25T16:53:50.ogg", kwargs[
+        assert "/root/project/voice/voice_2019-07-25T14:53:50.ogg", kwargs[
             "file_name"
         ]
         return kwargs["file_name"]
@@ -108,7 +108,7 @@ class MediaDownloaderTestCase(unittest.TestCase):
         self.assertEqual(
             (
                 "AwADBQADbwAD2oTRVeHe5eXRFftfAg",
-                "/root/project/voice/voice_2019-07-25T16:53:50.ogg",
+                "/root/project/voice/voice_2019-07-25T14:53:50.ogg",
             ),
             result,
         )