diff --git a/convert_tendl.py b/convert_tendl.py
index 824ae1a..2b337d8 100755
--- a/convert_tendl.py
+++ b/convert_tendl.py
@@ -70,7 +70,7 @@ class CustomFormatter(argparse.ArgumentDefaultsHelpFormatter,
 # This can be exstened to accommodated new releases
 release_details = {
     '2015': {
-        'base_url': 'https://tendl.web.psi.ch/tendl_2015/tar_files/',
+        'base_url': 'https://tendl.imperial.ac.uk/tendl_2015/tar_files/',
         'compressed_files': ['ACE-n.tgz'],
         'neutron_files': ace_files_dir.glob('neutron_file/*/*/lib/endf/*-n.ace'),
         'metastables': ace_files_dir.glob('neutron_file/*/*/lib/endf/*m-n.ace'),
@@ -78,7 +78,7 @@ class CustomFormatter(argparse.ArgumentDefaultsHelpFormatter,
         'uncompressed_file_size': '40 GB'
     },
     '2017': {
-        'base_url': 'https://tendl.web.psi.ch/tendl_2017/tar_files/',
+        'base_url': 'https://tendl.imperial.ac.uk/tendl_2017/tar_files/',
         'compressed_files': ['tendl17c.tar.bz2'],
         'neutron_files': ace_files_dir.glob('ace-17/*'),
         'metastables': ace_files_dir.glob('ace-17/*m'),
@@ -86,7 +86,7 @@ class CustomFormatter(argparse.ArgumentDefaultsHelpFormatter,
         'uncompressed_file_size': '14 GB'
     },
     '2019': {
-        'base_url': 'https://tendl.web.psi.ch/tendl_2019/tar_files/',
+        'base_url': 'https://tendl.imperial.ac.uk/tendl_2019/tar_files/',
         'compressed_files': ['tendl19c.tar.bz2'],
         'neutron_files': ace_files_dir.glob('tendl19c/*'),
         'metastables': ace_files_dir.glob('tendl19c/*m'),
@@ -94,7 +94,7 @@ class CustomFormatter(argparse.ArgumentDefaultsHelpFormatter,
         'uncompressed_file_size': '10.1 GB'
     },
     '2021': {
-        'base_url': 'https://tendl.web.psi.ch/tendl_2021/tar_files/',
+        'base_url': 'https://tendl.imperial.ac.uk/tendl_2021/tar_files/',
         'compressed_files': ['tendl21c.tar.bz2'],
         'neutron_files': ace_files_dir.glob('tendl21c/*'),
         'metastables': ace_files_dir.glob('tendl21c/*m'),
diff --git a/convert_tendl_rand.py b/convert_tendl_rand.py
index a1955e7..61a057f 100755
--- a/convert_tendl_rand.py
+++ b/convert_tendl_rand.py
@@ -95,15 +95,15 @@ def main():
 
     release_details = {
         "ENDF2017": {
-            "base_url": "https://tendl.web.psi.ch/tendl_2017/tar_files/",
+            "base_url": "https://tendl.imperial.ac.uk/tendl_2017/tar_files/",
             "ending": ".random.tgz",
         },
         "ENDF2015": {
-            "base_url": "https://tendl.web.psi.ch/tendl_2015/tar_files/",
+            "base_url": "https://tendl.imperial.ac.uk/tendl_2015/tar_files/",
             "ending": ".random.tgz",
         },
         "ACE2015": {
-            "base_url": "https://tendl.web.psi.ch/tendl_2015/tar_files/",
+            "base_url": "https://tendl.imperial.ac.uk/tendl_2015/tar_files/",
             "ending": ".10.2016.tgz",
         },
     }
diff --git a/depletion/generate_tendl_chain.py b/depletion/generate_tendl_chain.py
index 59dce5e..4a71721 100755
--- a/depletion/generate_tendl_chain.py
+++ b/depletion/generate_tendl_chain.py
@@ -19,7 +19,7 @@
 from utils import download, fix_missing_tpid
 
 
-NEUTRON_LIB = 'https://tendl.web.psi.ch/tendl_2019/tar_files/TENDL-n.tgz'
+NEUTRON_LIB = 'https://tendl.imperial.ac.uk/tendl_2019/tar_files/TENDL-n.tgz'
 DECAY_LIB = {
     'jeff33': 'https://www.oecd-nea.org/dbdata/jeff/jeff33/downloads/JEFF33-rdd.zip',
     'endf80': 'https://www.nndc.bnl.gov/endf-b8.0/zips/ENDF-B-VIII.0_decay.zip',
diff --git a/generate_endf.py b/generate_endf.py
index dbc6133..6d8fc74 100755
--- a/generate_endf.py
+++ b/generate_endf.py
@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 
 """
-Download ENDF/B-VIII.0 or ENDF/B-VII.1 library for use in OpenMC by first
+Download ENDF/B-VIII.1, ENDF/B-VIII.0 or ENDF/B-VII.1 library for use in OpenMC by first
 processing ENDF files using NJOY. The resulting library will contain incident
 neutron, incident photon, and thermal scattering data.
 """
diff --git a/generate_jeff33.py b/generate_jeff33.py
index 77d4455..a6a1f9b 100755
--- a/generate_jeff33.py
+++ b/generate_jeff33.py
@@ -78,8 +78,8 @@ def sort_key(path):
     ]
 
     tendl_files = [
-        'https://tendl.web.psi.ch/tendl_2019/neutron_file/C/C013/lib/endf/n-C013.tendl',
-        'https://tendl.web.psi.ch/tendl_2019/neutron_file/O/O017/lib/endf/n-O017.tendl',
+        'https://tendl.imperial.ac.uk/tendl_2017/neutron_file/C/C013/lib/endf/n-C013.tendl',
+        'https://tendl.imperial.ac.uk/tendl_2017/neutron_file/O/O017/lib/endf/n-O017.tendl',
     ]
 
     neutron_dir = Path('endf6')