diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index d20a78bb1..f8260d57d 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -9,7 +9,7 @@ version: 2
 build:
   os: ubuntu-20.04
   tools:
-    python: "3.9"
+    python: "3.13"
     # You can also specify other tool versions:
     # nodejs: "16"
     # rust: "1.55"
diff --git a/docs/requirements.txt b/docs/requirements.txt
index cb20fd944..09b59bffd 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,7 +1,7 @@
 rst2pdf
 
 # define sphinx versioning
-sphinx==5.3.0
+sphinx==8.1.3
 furo
 readthedocs-sphinx-search==0.3.2
 sphinx_copybutton