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