diff --git a/doc/conf.py b/doc/conf.py
index 59964034e8fac4f87cb9144f31c4ff36fc5ce89b..d5adf2c95a7979fa21a345e971a48fc61474b290 100755
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -231,15 +231,3 @@ autodoc_default_options = {
     "undoc-members": True,
     "show-inheritance": True,
 }
-
-# For inter-documentation mapping:
-from bob.extension.utils import link_documentation, load_requirements
-
-sphinx_requirements = "extra-intersphinx.txt"
-if os.path.exists(sphinx_requirements):
-    intersphinx_mapping = link_documentation(
-        additional_packages=["python", "numpy"]
-        + load_requirements(sphinx_requirements)
-    )
-else:
-    intersphinx_mapping = link_documentation()
diff --git a/pyproject.toml b/pyproject.toml
index db93bed0cda57d38df797773d46b12bf0e43f503..dfdd6e8bf25fe654a73ffeec17e4a31984ef529a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,6 @@
     ]
     dependencies = [
         "setuptools",
-        "bob.extension",
         "dask",
         "dask-ml",
         "h5py >= 3",