diff --git a/README.md b/README.md
index 253fe43..81a9d77 100644
--- a/README.md
+++ b/README.md
@@ -52,7 +52,7 @@ Library `ants` implements a goroutine pool with fixed capacity, managing and rec
 go get -u github.com/panjf2000/ants
 ```
 
-### For `ants` v2
+### For `ants` v2 (with GO111MODULE=on)
 
 ```powershell
 go get -u github.com/panjf2000/ants/v2
diff --git a/README_ZH.md b/README_ZH.md
index 6c10742..27c2ae1 100644
--- a/README_ZH.md
+++ b/README_ZH.md
@@ -52,7 +52,7 @@
 go get -u github.com/panjf2000/ants
 ```
 
-### 使用 `ants` v2 版本:
+### 使用 `ants` v2 版本 (开启 GO111MODULE=on):
 
 ```powershell
 go get -u github.com/panjf2000/ants/v2