diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 8fb25855..5f5833fe 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,9 +1,15 @@
 version: 2
+
 build:
   os: ubuntu-22.04
   tools:
-    python: "3.11"
+    python: "3.12"
   apt_packages: [emacs-nox]
+
+  python:
+    install:
+      - requirements: doc/requirements.txt
+
   jobs:
     pre_build:
       - scripts/evil-extract-docstrings
diff --git a/doc/requirements.txt b/doc/requirements.txt
new file mode 100644
index 00000000..4e09d9c3
--- /dev/null
+++ b/doc/requirements.txt
@@ -0,0 +1,2 @@
+Sphinx==7.3.7
+sphinx-rtd-theme==2.0.0
diff --git a/doc/source/_ext/elisp.py b/doc/source/_ext/elisp.py
index a4da67ef..ab82105c 100644
--- a/doc/source/_ext/elisp.py
+++ b/doc/source/_ext/elisp.py
@@ -2,15 +2,11 @@
 from os import path
 import json
 
-from docutils import nodes
-from docutils.parsers.rst import Directive
-
 from sphinx import addnodes
 from sphinx.domains import Domain, ObjType, Index
 from sphinx.domains.std import StandardDomain
 from sphinx.directives import ObjectDescription
 from sphinx.roles import XRefRole
-from sphinx.util.docfields import Field
 from sphinx.util.nodes import make_refnode