diff --git a/requirements.txt b/requirements.txt
index 2968b6c..977eac9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-sphinx==4.0.2
+sphinx==6.1.3
 sphinx-rtd-theme==0.5.2
 sphinxcontrib-httpdomain==1.7.0
 sphinxcontrib-bibtex==2.3.0