diff --git a/README.md b/README.md
index 971115d..c1dfeff 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,8 @@ of the config.
 ## Installation
 
 You will need to have go installed to build the package.
+Please make sure your go version is `>= 1.9`.
+
 Running `go get github.com/alice-lg/birdwatcher` will give you
 a binary. You might need to cross-compile it for your
 bird-running servive (`GOARCH` and `GOOS` are your friends).