diff --git a/dev-docs/source/conf.py b/dev-docs/source/conf.py
index 13d67fcecaa3062d0e883867f2e220d7c37e89f8..8f10e560e127bd0aff5d1485099c70eec5884ac9 100644
--- a/dev-docs/source/conf.py
+++ b/dev-docs/source/conf.py
@@ -168,7 +168,7 @@ epub_uid = "Mantid Reference: " + version
 # -- Link to other projects ----------------------------------------------------
 
 intersphinx_mapping = {
-    'h5py': ('http://docs.h5py.org/en/latest/', None),
+    'h5py': ('https://h5py.readthedocs.io/en/stable/', None),
     'matplotlib': ('http://matplotlib.org', None),
     'numpy': ('https://docs.scipy.org/doc/numpy/', None),
     'python': ('https://docs.python.org/3/', None),
diff --git a/docs/source/conf.py b/docs/source/conf.py
index bf8bd1eaf32269c9c06c0a16cf6bf1d15fa27c31..4e630d95a24457d8bdf6f5569800ef32aad82fbc 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -208,7 +208,7 @@ exec(compile(open(html_theme_cfg).read(), html_theme_cfg, 'exec'))
 # -- Link to other projects ----------------------------------------------------
 
 intersphinx_mapping = {
-    'h5py': ('https://docs.h5py.org/en/latest/', None),
+    'h5py': ('https://h5py.readthedocs.io/en/stable/', None),
     'matplotlib': ('https://matplotlib.org', None),
     'numpy': ('https://docs.scipy.org/doc/numpy/', None),
     'python': ('https://docs.python.org/3/', None),