diff --git a/README.md b/README.md
index 250fdc9..4f80a2f 100644
--- a/README.md
+++ b/README.md
@@ -12,6 +12,6 @@ An action that builds a Debian package from source in a Docker container.
     source_directory: lolcat
     # Optional, relative to workspace directory
     artifacts_directory: output
-    os_distribution: bionic
     # Optional, value from `debian/changelog` is used if not defined
+    os_distribution: bionic
 ```