diff --git a/README.md b/README.md
index 955c0aa..450a890 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,5 @@
 
 # Install
 pod 'AliPay', '~> 2.1.2.1'
+
+pod 'AliPay', :git => 'https://github.com/beiliubei/AliPay.git', :tag => '2.1.2.1'
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