Update README.md
diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -60,7 +60,7 @@
If you wish to update and test the site locally, there is a Docker build script you can use.
You will also need Git, and familiarity with working in a command-line shell.
-**The following instructions should work for Unix and macOS, but will need adjustment for Windows.**
+**The following instructions should work for Unix, Linux, and macOS, but will need adjustment for Windows.**
- Install [Docker](https://www.docker.com/get-started).
- Change to a suitable directory.
