diff --git a/README.md b/README.md
index 4d82e22..e193f46 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,8 @@ If renovate is set up for your repo, it'll add and update the pinned digest/hash
 
 ## Development
 
+Generally you should have `Docker` or something alike installed.
+
 If you need to copy files into the container, don't forget to add exclusions to the general _exclude all_ in `.dockerignore`.
 
 To **update the base image** (like `3.12.4-alpine3.20` to a newer Alpine version), manual work is still required, but supported by a little script. **Renovate might not create a PR for newer image tags.**