diff --git a/CHANGELOG.md b/CHANGELOG.md
index e84639d7..076e9e9e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [PEP 440](https://www.python.org/dev/peps/pep-0440/)
 and uses [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.1.3]
+### Changed
+- Updated download URLs for Sentinel-1 AUX_CAL files.
+
 ## [2.1.2]
 ### Added
 - Added `mypy` type checker to the [`static-analysis`](https://github.com/ASFHyP3/hyp3-isce2/blob/develop/.github/workflows/static-analysis.yml) workflow.
diff --git a/src/hyp3_isce2/s1_auxcal.py b/src/hyp3_isce2/s1_auxcal.py
index 0f5fbbcb..eddc989b 100644
--- a/src/hyp3_isce2/s1_auxcal.py
+++ b/src/hyp3_isce2/s1_auxcal.py
@@ -21,8 +21,8 @@
 import requests
 
 
-S1A_AUX_URL = 'https://sar-mpc.eu/download/55282da1-679d-4ecf-aeef-d06b024451cf'
-S1B_AUX_URL = 'https://sar-mpc.eu/download/3c8b7c8d-d3de-4381-a19d-7611fb8734b9'
+S1A_AUX_URL = 'https://sar-mpc.eu/files/S1A_AUX_CAL_20241128.zip'
+S1B_AUX_URL = 'https://sar-mpc.eu/files/S1B_AUX_CAL_20241128.zip'
 
 
 def _download_platform(url: str, aux_cal_dir: Path):
@@ -38,7 +38,11 @@ def _download_platform(url: str, aux_cal_dir: Path):
 
     content = BytesIO(response.content)
     with zipfile.ZipFile(content) as zip_file:
-        zip_file.extractall(aux_cal_dir)
+        for zip_info in zip_file.infolist():
+            # remove leading directories, i.e. extract S1A/AUX_CAL/2019/02/28/foo.SAFE/* to foo.SAFE/*
+            if not zip_info.is_dir() and '.SAFE/' in zip_info.filename:
+                zip_info.filename = '/'.join(zip_info.filename.split('/')[5:])
+                zip_file.extract(zip_info, aux_cal_dir)
 
 
 def download_aux_cal(aux_cal_dir: Union[str, Path] = 'aux_cal'):
diff --git a/tests/test_s1_auxcal.py b/tests/test_s1_auxcal.py
index b28e0b69..f879f45f 100644
--- a/tests/test_s1_auxcal.py
+++ b/tests/test_s1_auxcal.py
@@ -7,5 +7,13 @@ def test_download_aux_cal(tmp_path):
     """
     aux_cal_dir = tmp_path / 'aux_cal'
     s1_auxcal.download_aux_cal(aux_cal_dir)
-    assert (aux_cal_dir / 'S1A_AUX_CAL_V20190228T092500_G20210104T141310.SAFE').exists()
-    assert (aux_cal_dir / 'S1B_AUX_CAL_V20190514T090000_G20210104T140612.SAFE').exists()
+
+    assert (aux_cal_dir / 'S1A_AUX_CAL_V20150722T120000_G20151125T104733.SAFE/data/s1a-aux-cal.xml').exists()
+    assert (aux_cal_dir / 'S1A_AUX_CAL_V20150722T120000_G20151125T104733.SAFE/manifest.safe').exists()
+    assert (aux_cal_dir / 'S1A_AUX_CAL_V20150722T120000_G20151125T104733.SAFE/support/s1-object-types.xsd').exists()
+    assert (aux_cal_dir / 'S1A_AUX_CAL_V20150722T120000_G20151125T104733.SAFE/support/s1-aux-cal.xsd').exists()
+
+    assert (aux_cal_dir / 'S1B_AUX_CAL_V20160422T000000_G20160701T144618.SAFE/data/s1b-aux-cal.xml').exists()
+    assert (aux_cal_dir / 'S1B_AUX_CAL_V20160422T000000_G20160701T144618.SAFE/manifest.safe').exists()
+    assert (aux_cal_dir / 'S1B_AUX_CAL_V20160422T000000_G20160701T144618.SAFE/support/s1-object-types.xsd').exists()
+    assert (aux_cal_dir / 'S1B_AUX_CAL_V20160422T000000_G20160701T144618.SAFE/support/s1-aux-cal.xsd').exists()