diff --git a/oggm/tests/test_utils.py b/oggm/tests/test_utils.py
index 2a6b9f4c7..26302beca 100644
--- a/oggm/tests/test_utils.py
+++ b/oggm/tests/test_utils.py
@@ -2225,8 +2225,7 @@ def test_copdem90(self):
 
         # Make a fake topo file
         deep_path = os.path.join(self.dldir,
-                                 'DEM1_SAR_DGE_90_20110517T170701_20140817T170857'
-                                 '_ADS_000000_3682.DEM',
+                                 'COP-DEM_GLO-90-DGED__2022_1',
                                  'Copernicus_DSM_30_N46_00_E010_00', 'DEM')
         utils.mkdir(deep_path)
         upper_path = os.path.dirname(os.path.dirname(deep_path))
@@ -2237,14 +2236,13 @@ def test_copdem90(self):
                               archive='tar', extension='.tar')
 
         def down_check(url, *args, **kwargs):
-            expected = ('ftps://cdsdata.copernicus.eu:990/datasets/'
-                        'COP-DEM_GLO-90-DGED/2022_1/'
-                        'DEM1_SAR_DGE_90_20110517T170701_20140817T170857_ADS_'
-                        '000000_3682.DEM.tar')
+            expected = ('https://prism-dem-open.copernicus.eu/pd-desk-open-access/prismDownload/'
+                        'COP-DEM_GLO-90-DGED__2022_1/'
+                        'Copernicus_DSM_30_N46_00_E010_00.tar')
             self.assertEqual(expected, url)
             return tf
 
-        with FakeDownloadManager('download_with_authentication', down_check):
+        with FakeDownloadManager('file_downloader', down_check):
             of, source = utils.get_topo_file([10.5, 10.8], [46.6, 46.8],
                                              source='COPDEM90')
 
@@ -2255,8 +2253,7 @@ def test_copdem30(self):
 
         # Make a fake topo file
         deep_path = os.path.join(self.dldir,
-                                 'DEM1_SAR_DGE_30_20110517T170701_20140817T170857'
-                                 '_ADS_000000_bma2.DEM',
+                                 'COP-DEM_GLO-30-DGED__2022_1',
                                  'Copernicus_DSM_10_N46_00_E010_00', 'DEM')
         utils.mkdir(deep_path)
         upper_path = os.path.dirname(os.path.dirname(deep_path))
@@ -2267,14 +2264,13 @@ def test_copdem30(self):
                               archive='tar', extension='.tar')
 
         def down_check(url, *args, **kwargs):
-            expected = ('ftps://cdsdata.copernicus.eu:990/datasets/'
-                        'COP-DEM_GLO-30-DGED/2022_1/'
-                        'DEM1_SAR_DGE_30_20110517T170701_20140817T170857_ADS_'
-                        '000000_bma2.DEM.tar')
+            expected = ('https://prism-dem-open.copernicus.eu/pd-desk-open-access/prismDownload/'
+                        'COP-DEM_GLO-30-DGED__2022_1/'
+                        'Copernicus_DSM_10_N46_00_E010_00.tar')
             self.assertEqual(expected, url)
             return tf
 
-        with FakeDownloadManager('download_with_authentication', down_check):
+        with FakeDownloadManager('file_downloader', down_check):
             of, source = utils.get_topo_file([10.5, 10.8], [46.6, 46.8],
                                              source='COPDEM30')
 
diff --git a/oggm/utils/_downloads.py b/oggm/utils/_downloads.py
index 5b644da0e..26b426e3d 100644
--- a/oggm/utils/_downloads.py
+++ b/oggm/utils/_downloads.py
@@ -1163,12 +1163,9 @@ def _download_copdem_file_unlocked(cppfile, tilename, source):
         return demfile
 
     # Did we download it yet?
-    ftpfile = ('ftps://cdsdata.copernicus.eu:990/' +
-               'datasets/COP-DEM_GLO-{}-DGED/2022_1/'.format(source[-2:]) +
-               cppfile)
-
-    dest_file = download_with_authentication(ftpfile,
-                                             'spacedata.copernicus.eu')
+    url = (f"https://prism-dem-open.copernicus.eu/pd-desk-open-access/prismDownload"
+           f"/COP-DEM_GLO-{source[-2:]}-DGED__2022_1/{tilename}.tar")
+    dest_file = file_downloader(url)
 
     # None means we tried hard but we couldn't find it
     if not dest_file: