diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 82d2da271..f539c2d4a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -52,6 +52,8 @@ asking for suggestions on how to address the documentation part.
 
 ### Build
 
+Use go 1.9.1 or newer.
+
 The first time after you fork or after dependencies get updated, run:
 
 ```sh