diff --git a/tensorflow_datasets/datasets/radon/radon_dataset_builder.py b/tensorflow_datasets/datasets/radon/radon_dataset_builder.py
index 55f5371721b..b922e6ef738 100644
--- a/tensorflow_datasets/datasets/radon/radon_dataset_builder.py
+++ b/tensorflow_datasets/datasets/radon/radon_dataset_builder.py
@@ -28,7 +28,7 @@
 from tensorflow_datasets.core.utils.lazy_imports_utils import tensorflow as tf
 import tensorflow_datasets.public_api as tfds
 
-BASE_URL = 'http://www.stat.columbia.edu/~gelman/arm/examples/radon/'
+BASE_URL = 'https://sites.stat.columbia.edu/gelman/arm/examples/radon/'
 
 
 def convert_to_int(d):