diff --git a/examples/plane_wave_compound.py b/examples/plane_wave_compound.py
index fed0534..f44e3ca 100644
--- a/examples/plane_wave_compound.py
+++ b/examples/plane_wave_compound.py
@@ -67,7 +67,8 @@
 print("📂 Downloading PICMUS challenge dataset...")
 
 # Download the UFF data file (cached locally after first download)
-url = "http://www.ustb.no/datasets/PICMUS_experiment_resolution_distortion.uff"
+# Source: https://unioslo.github.io/USTB/datasets.html
+url = "https://zenodo.org/records/20261898/files/PICMUS_experiment_resolution_distortion.uff"
 uff_path = cached_download(
     url,
     expected_size=145_518_524,
diff --git a/marimo/plane_wave_compound.py b/marimo/plane_wave_compound.py
index b2c464f..9385d68 100644
--- a/marimo/plane_wave_compound.py
+++ b/marimo/plane_wave_compound.py
@@ -78,7 +78,8 @@ def _():
 @app.cell
 def _(cached_download, hashlib):
     # Download PICMUS Challenge Dataset (runs once, cached)
-    url = "http://www.ustb.no/datasets/PICMUS_experiment_resolution_distortion.uff"
+    # Source: https://unioslo.github.io/USTB/datasets.html
+    url = "https://zenodo.org/records/20261898/files/PICMUS_experiment_resolution_distortion.uff"
     uff_path = cached_download(
         url,
         expected_size=145_518_524,
diff --git a/tests/conftest.py b/tests/conftest.py
index c7c6686..c335a69 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -111,7 +111,8 @@ def xp(request):
 @pytest.fixture(scope="session")
 def picmus_phantom_resolution_uff() -> Uff:
     """Download the UFF data of the Picmus phantom resolution UFF file."""
-    url = "http://www.ustb.no/datasets/PICMUS_experiment_resolution_distortion.uff"
+    # Source: https://unioslo.github.io/USTB/datasets.html
+    url = "https://zenodo.org/records/20261898/files/PICMUS_experiment_resolution_distortion.uff"
     uff_path = cached_download(
         url,
         expected_size=145_518_524,