diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 9631da6..15e9f02 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -12,7 +12,8 @@ jobs:
           python-version: '3.10'
       - name: Install dependencies
         run: |
-          pip install sphinx sphinx_rtd_theme
+          python -m pip install --upgrade pip
+          pip install '.[doc]'
       - name: Sphinx build
         run: |
           sphinx-build -b html docs/source docs/build/html
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index af36e53..a6b7028 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -7,9 +7,10 @@ build:
 
 python:
   install:
-    - requirements: docs/requirements.txt
     - method: pip
       path: .
+      extra_requirements:
+        - doc
   system_packages: true
 
 sphinx:
diff --git a/docs/requirements.txt b/docs/requirements.txt
deleted file mode 100644
index e69de29..0000000
diff --git a/pyproject.toml b/pyproject.toml
index 961d448..19a709e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -24,3 +24,7 @@ dev = [
   "freezegun==1.5.1",
   "pytest==8.2.2",
 ]
+doc = [
+  "sphinx==7.3.7",
+  "sphinx_rtd_theme==2.0.0",
+]