diff --git a/docs/requirements.txt b/docs/requirements.txt
index f683fd52355..2916b3cee6a 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,7 +1,7 @@
 # Used by ReadTheDocs; pinned requirements for stability.
 
 myst-parser==1.0.0
-Sphinx==5.3.0
+Sphinx==6.1.3
 # Older versions break Sphinx even though they're declared to be supported.
 docutils==0.19
 sphinxcontrib-programoutput==0.17