diff --git a/README.md b/README.md
index a44a1e2..d405a73 100644
--- a/README.md
+++ b/README.md
@@ -40,6 +40,16 @@ func handle(w http.ResponseWriter, r *http.Request) {
 
 ![image](example/captcha-math.png)
 
+## Compatibility
+
+This package is in a module and I recommand using the following version of Go:
+
+* 1.9.7+ for Go 1.9
+* 1.10.3+ for Go 1.10
+* Go 1.11 or later
+
+## Benchmarks
+
 ## Contributing
 If your found a bug, please contribute!
 see [contributing.md](contributing.md) for more detail.