diff --git a/docs/conf.py b/docs/conf.py
index 9e8bf685..1f00d233 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -276,15 +276,17 @@
     "https://upload.pypi.org/legacy",
 ]
 
-# Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {"https://docs.python.org/": None}
+intersphinx_mapping = {
+    "python": ("https://docs.python.org/3", None),
+    "requests": ("https://docs.python-requests.org/en/latest/", None),
+}
 
 # Be strict about the invalid references:
 nitpicky = True
 
 # TODO: Try to add these to intersphinx_mapping
 nitpick_ignore_regex = [
-    (r"py:.*", r"(pkginfo|requests|IO).*"),
+    (r"py:.*", r"(pkginfo|IO).*"),
 ]
 
 # -- Options for apidoc output ------------------------------------------------
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 3b45abf9..3fe4feb3 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,5 @@
 doc8>=0.8.0
-furo >= 2021.7.5b38
+furo>=2021.10.09
 readme-renderer>=17.4
-Sphinx>=1.7.0
+Sphinx>=4.2.0
 sphinxcontrib-programoutput>=0.17