diff --git a/README.md b/README.md
index e7c9fbde1..8c5b9b9f2 100644
--- a/README.md
+++ b/README.md
@@ -53,6 +53,16 @@ To create a virtual environment:
 uv venv  # Create a virtual environment at .venv.
 ```
 
+To activate the virtual environment:
+
+```shell
+# On macOS and Linux.
+source .venv/bin/activate
+
+# On Windows.
+.\.venv\Scripts\activate.ps1
+```
+
 To install a package into the virtual environment:
 
 ```shell