diff --git a/README.md b/README.md
index 4e55f52..e98e978 100644
--- a/README.md
+++ b/README.md
@@ -28,9 +28,9 @@ $ uv pip install -e .  # or -e '.[snappy]' if you need snappy kickoff
 ## Building the Manual
 
 ```bash
-$ pip install -r requirements/develop.txt
+$ uv sync --all-extras --group docs
 $ cd docs_manual
-$ make clean html
+$ uv run make clean html
 $ ls _build/html/index.html
 ```
 
diff --git a/docs_manual/conf.py b/docs_manual/conf.py
index 4077755..26fcabb 100755
--- a/docs_manual/conf.py
+++ b/docs_manual/conf.py
@@ -74,7 +74,7 @@
 #
 # 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.