diff --git a/lambda-handler.js b/lambda-handler.js
index bd49244..9d2ee65 100644
--- a/lambda-handler.js
+++ b/lambda-handler.js
@@ -1,8 +1,8 @@
 var tachyon = require( './index' )
 
 exports.handler = function( event, context ) {
-	var region = event.region
-	var bucket = event.bucket
+	var region = process.env.S3_REGION
+	var bucket = process.env.S3_BUCKET
 	var key = event.key
 	var args = event.args
 	return tachyon.s3( { region: region, bucket: bucket }, key, args, function( err, data, info ) {