diff --git a/docs/conf.py b/docs/conf.py
index 2c8322352..230855ca1 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -67,7 +67,7 @@
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = 'en'
 
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
diff --git a/docs/requirements.txt b/docs/requirements.txt
index 9d324374d..1f3307af5 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,2 +1,2 @@
-sphinx==4.3.1
+sphinx==5.0.0
 sphinx-rtd-theme==1.0.0