diff --git a/docs/requirements.txt b/docs/requirements.txt
index 6f2c99e..6e098bd 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,4 +1,4 @@
-Sphinx==4.0.2
+Sphinx==5.1.1
 sphinxcontrib-httpdomain==1.7.0
 sphinx-rtd-theme==0.5.2
 sphinxcontrib-bibtex==2.3.0