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diff --git a/README.md b/README.md
index d9f3301..6a64b7f 100644
--- a/README.md
+++ b/README.md
@@ -51,6 +51,20 @@ Update the URL of an existing repository mirror:
 Development
 -----------
 
+### Virtual environment
+
+Create a virtual environment:
+
+    make venv
+
+Load a REPL:
+
+    make repl
+
+Upgrade virtual environment packages (this will also update requirements.txt):
+
+    make venv/upgrade
+
 ### Linting
 
 Requires [Pylint].