diff --git a/Installation.md b/Installation.md
index 71d7b8e..a6aae6b 100644
--- a/Installation.md
+++ b/Installation.md
@@ -3,6 +3,7 @@ Iris is a cross-platform software.
 The only requirement is the [Go Programming Language](https://golang.org/dl/), version 1.12 and above.
 
 ```sh
+$ export GO111MODULE=on
 $ go get github.com/kataras/iris@v11.2.8
 ```