diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index f334b70..62cc0b0 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,9 +1,9 @@
 version: 2
 
 build:
-  os: ubuntu-22.04
+  os: ubuntu-24.04
   tools:
-    python: "3.11"
+    python: "3.13"
 
 sphinx:
    configuration: docs/conf.py
diff --git a/docs/Makefile b/docs/Makefile
index 021ffbf..d4bb2cb 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -18,6 +18,3 @@ help:
 # "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
 %: Makefile
 	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
-
-autobuild:
-	sphinx-autobuild . build/html
diff --git a/docs/requirements.txt b/docs/requirements.txt
index b40b029..b651fef 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,3 @@
-sphinx>=7.2.6
-sphinx-copybutton>=0.5.2
-sphinxext-opengraph>=0.8.2
-furo>=2023.9.10
+sphinx>=8.1.3,<9
+sphinx-copybutton>=0.5.2,<1
+furo>=2024.5.6,<2025