diff --git a/docs/requirements.txt b/docs/requirements.txt
index ad9a143..2789f18 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,3 @@
-sphinx==4.5.0
+sphinx==6.1.3
 sphinx_rtd_theme==1.1.1
 m2r2==0.3.2