diff --git a/.github/workflows/build-docs.yml b/.github/workflows/build-docs.yml
index c9e56dc9..f0e565f2 100644
--- a/.github/workflows/build-docs.yml
+++ b/.github/workflows/build-docs.yml
@@ -12,4 +12,4 @@ jobs:
     - uses: ammaraskar/sphinx-action@master
       with:
         docs-folder: "doc"
-        pre-build-command: 'pip install -U sphinx_rtd_theme docutils'
+        pre-build-command: 'pip install -r doc/requirements.txt'
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 71532212..6f79128e 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -10,3 +10,7 @@ submodules:
 sphinx:
   configuration: doc/conf.py
   fail_on_warning: true
+
+python:
+  install:
+    - requirements: doc/requirements.txt