diff --git a/.readthedocs.yml b/.readthedocs.yml
index 3a0b3097..61a65b2d 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -7,9 +7,9 @@ version: 2
 
 # Set the version of Python and other tools you might need
 build:
-  os: ubuntu-20.04
+  os: ubuntu-24.04
   tools:
-    python: "3.9"
+    python: "3.12"
 
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
diff --git a/docs/requirements.txt b/docs/requirements.txt
index aeb20f41..cc40a7de 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,10 +1,10 @@
-sphinx >4, <5
+sphinx
 sphinx-autodoc-typehints
-sphinx-book-theme>=0.3.3
-sphinx-copybutton>=0.5.0
+sphinx-book-theme
+sphinx-copybutton
 sphinx-design
 sphinx-remove-toctrees
-jupyter-sphinx>=0.3.2
+jupyter-sphinx
 myst-nb
 
 # Install the Fiddle package itself.