diff --git a/docs/conf.py b/docs/conf.py
index f7e71505..8b751dab 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -66,7 +66,7 @@
 html_title = "Reserving in Python"
 jupyter_cache = ""
 jupyter_execute_notebooks = "force"
-language = None
+language = "en"
 latex_engine = "pdflatex"
 myst_enable_extensions = ["colon_fence", "dollarmath", "linkify", "substitution"]
 myst_url_schemes = ["mailto", "http", "https"]