--- a/README.md	Wed Sep 19 20:52:48 2018 +0200
+++ b/README.md	Sat Sep 29 11:46:33 2018 +0200
@@ -19,6 +19,9 @@
 
     go get github.com/McKael/madon
 
+For minimal compatibility with Go modules support (in Go v1.11), it is
+recommended to use Go version 1.9+.
+
 You can test it with my CLI tool:
 
     go get github.com/McKael/madonctl