diff --git a/.readthedocs.yaml b/.readthedocs.yaml
new file mode 100644
index 0000000..1e44495
--- /dev/null
+++ b/.readthedocs.yaml
@@ -0,0 +1,6 @@
+version: 2
+
+python:
+  install:
+  - requirements: requirements-docs.txt
+
diff --git a/docs/conf.py b/docs/conf.py
index 8f3d18f..0b9e073 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -38,6 +38,7 @@
     'sphinx.ext.autodoc',
     'sphinx.ext.doctest',
     'sphinx.ext.intersphinx',
+    'sphinx_rtd_theme',
 ]
 
 # Add any paths that contain templates here, relative to this directory.
diff --git a/newsfragments/43.internal.rst b/newsfragments/43.internal.rst
new file mode 100644
index 0000000..d62a2a7
--- /dev/null
+++ b/newsfragments/43.internal.rst
@@ -0,0 +1 @@
+remove unused docs deps, bump version of remaining
diff --git a/setup.py b/setup.py
index 55352cc..87b026c 100644
--- a/setup.py
+++ b/setup.py
@@ -18,8 +18,8 @@
         "pydocstyle>=3.0.0,<4",
     ],
     'doc': [
-        "sphinx>=4.2.0,<5",
-        "sphinx_rtd_theme>=0.1.9",
+        "sphinx>=5.0.0",
+        "sphinx_rtd_theme>=1.0.0",
         "towncrier>=21,<22",
     ],
     'dev': [