diff --git a/README.md b/README.md
index 8f4c979..a144ec5 100644
--- a/README.md
+++ b/README.md
@@ -97,7 +97,9 @@ This is a more simple example (also with spam-less #1 usage):
 
 ## browsers support
 
-// WIP
+`"browserslist": "> 0.25%, not dead"`
+
+see the compatibility of mailgo on <a href="https://browserl.ist/?q=%3E+0.25%25%2C+not+dead">browserl.ist</a>
 
 ---
 
diff --git a/babel.config.js b/babel.config.js
index 7eb0f3c..731b2b1 100644
--- a/babel.config.js
+++ b/babel.config.js
@@ -1,3 +1,10 @@
-const presets = [["@babel/env"]];
+const presets = [
+  [
+    "@babel/env",
+    {
+      useBuiltIns: "entry"
+    }
+  ]
+];
 
 module.exports = { presets };