diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 03d62ae..db50329 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -25,3 +25,4 @@ go build                               # compiles and packages an executable bin
 go test ./... -v                       # runs tests with verbose output
 ./watchtower                           # runs the application (outside of a container)
 ```
+If you dont have it enabled, you'll either have to prefix each command with `GO111MODULE=on` or run `export GO111MODULE=on` before running the commands. [You can read more about modules here.](https://github.com/golang/go/wiki/Modules)