diff --git a/internal/version.go b/internal/version.go
new file mode 100644
index 0000000..0e85de1
--- /dev/null
+++ b/internal/version.go
@@ -0,0 +1,5 @@
+package internal
+
+// Version is the current build version of the demo service. It is embedded
+// into the startup banner and reported by the (future) /healthz endpoint.
+const Version = "0.1.0"