diff --git a/lib/6to5/util.js b/lib/6to5/util.js
index db07bfb01a..b1dc2d2549 100644
--- a/lib/6to5/util.js
+++ b/lib/6to5/util.js
@@ -1,11 +1,9 @@
-var estraverse = require("estraverse");
-var traverse   = require("./traverse");
-var esprima    = require("esprima-fb");
-var recast     = require("recast");
-var path       = require("path");
-var fs         = require("fs");
-var _          = require("lodash");
-var b          = require("ast-types").builders;
+var traverse = require("./traverse");
+var recast   = require("recast");
+var path     = require("path");
+var fs       = require("fs");
+var _        = require("lodash");
+var b        = require("ast-types").builders;
 
 exports.ensureBlock = function (node) {
   var block = node.body;