diff --git a/bob/extension/utils.py b/bob/extension/utils.py
index 56ebad9a2868a6175aa4f24fa8bb5f405182e21f..5b53f7a2ad1640ee36a2ab29cd0a81d6220e3c70 100644
--- a/bob/extension/utils.py
+++ b/bob/extension/utils.py
@@ -524,7 +524,7 @@ def link_documentation(additional_packages = ['python', 'numpy'], requirements_f
   _add_index('python', 'https://docs.python.org/%d.%d/' % sys.version_info[:2])
   _add_numpy_index()
   _add_index('scipy', 'https://docs.scipy.org/doc/scipy/')
-  _add_index('matplotlib', 'https://matplotlib.org/')
+  _add_index('matplotlib', 'https://matplotlib.org/stable/')
   _add_index('setuptools', 'https://setuptools.readthedocs.io/en/latest/')
   _add_index('six', 'https://six.readthedocs.io')
   _add_index('sqlalchemy', 'https://docs.sqlalchemy.org/en/latest/')