diff --git a/doc/requirements.txt b/doc/requirements.txt
index 602c9186..5c435796 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -1,7 +1,7 @@
 click==8.1.3
 entrypoints==0.4
 Pillow==9.2.0
-Sphinx==5.1.1
+Sphinx==6.1.3
 sphinx-rtd-theme==1.0.0
 ipython==8.4.0
 netCDF4==1.6.0