diff --git a/sphinx/README.md b/sphinx/README.md
index 48aae9e..4bcd44e 100644
--- a/sphinx/README.md
+++ b/sphinx/README.md
@@ -8,14 +8,15 @@ The template is adapted from the Blender manual to support the same extensions.
 
 Install dependencies.
 
-    pip3 install -r requirements.txt
+    python3 -m venv venv
+    ./venv/bin/pip3 install -r requirements.txt
 
 Add to Gitea app.ini.
 
     [markup.restructuredtext]
     ENABLED = true
     FILE_EXTENSIONS = .rst
-    RENDER_COMMAND = timeout 30s sudo -u sphinx python3 ./custom/sphinx/sphinx_to_html.py
+    RENDER_COMMAND = timeout 30s sudo -u sphinx ./custom/sphinx/venv/bin/python3 ./custom/sphinx/sphinx_to_html.py
 
     [markup.sanitizer.restructuredtext]
     ELEMENT = div