diff --git a/docs/contributing.rst b/docs/contributing.rst
index 9c7f0636f..f75f2516a 100644
--- a/docs/contributing.rst
+++ b/docs/contributing.rst
@@ -26,7 +26,8 @@ If you're on macOS, we recommend you skip the rest of this section and instead
 run Certbot in Docker. You can find instructions for how to do this :ref:`here
 <docker>`. If you're running on Linux, you can run the following commands to
 install dependencies and set up a virtual environment where you can run
-Certbot. You only need to do this once.
+Certbot. You will need to repeat this when Certbot's dependencies change or when
+a new plugin is introduced.
 
 .. code-block:: shell