diff --git a/lib/6to5/file.js b/lib/6to5/file.js
index 002c6b0e9a..d693f2bc44 100644
--- a/lib/6to5/file.js
+++ b/lib/6to5/file.js
@@ -5,7 +5,7 @@ var SHEBANG_REGEX = /^\#\!.*/;
 var transform = require("./transform");
 var recast    = require("recast");
 var util      = require("./util");
-var b         = require("recast").types.builders;
+var b         = require("ast-types").builders;
 var _         = require("lodash");
 
 function File(opts) {
diff --git a/lib/6to5/modules/common.js b/lib/6to5/modules/common.js
index 768eebea65..a5b99c78bc 100644
--- a/lib/6to5/modules/common.js
+++ b/lib/6to5/modules/common.js
@@ -1,7 +1,7 @@
 module.exports = CommonJSFormatter;
 
 var util = require("../util");
-var b    = require("recast").types.builders;
+var b    = require("ast-types").builders;
 
 function CommonJSFormatter(file) {
   this.file = file;
diff --git a/lib/6to5/transformers/_alias-functions.js b/lib/6to5/transformers/_alias-functions.js
index a00e4ce992..eb1ab30a22 100644
--- a/lib/6to5/transformers/_alias-functions.js
+++ b/lib/6to5/transformers/_alias-functions.js
@@ -1,6 +1,6 @@
 var traverse = require("../traverse");
 var util     = require("../util");
-var b        = require("recast").types.builders;
+var b        = require("ast-types").builders;
 
 var go = function (getBody, node, file) {
   var argumentsId;
diff --git a/lib/6to5/transformers/_declarations.js b/lib/6to5/transformers/_declarations.js
index b67c215e07..35ae415211 100644
--- a/lib/6to5/transformers/_declarations.js
+++ b/lib/6to5/transformers/_declarations.js
@@ -1,4 +1,4 @@
-var b = require("recast").types.builders;
+var b = require("ast-types").builders;
 var _ = require("lodash");
 
 module.exports = function (ast, file) {
diff --git a/lib/6to5/transformers/array-comprehension.js b/lib/6to5/transformers/array-comprehension.js
index a4b03a1ebe..af7fc9b533 100644
--- a/lib/6to5/transformers/array-comprehension.js
+++ b/lib/6to5/transformers/array-comprehension.js
@@ -1,5 +1,5 @@
 var util = require("../util");
-var b    = require("recast").types.builders;
+var b    = require("ast-types").builders;
 var _    = require("lodash");
 
 var single = function (node) {
diff --git a/lib/6to5/transformers/classes.js b/lib/6to5/transformers/classes.js
index 09e6aa16de..6b8e02d950 100644
--- a/lib/6to5/transformers/classes.js
+++ b/lib/6to5/transformers/classes.js
@@ -1,6 +1,6 @@
 var traverse = require("../traverse");
 var util     = require("../util");
-var b        = require("recast").types.builders;
+var b        = require("ast-types").builders;
 var _        = require("lodash");
 
 exports.ClassDeclaration = function (node, parent, file) {
diff --git a/lib/6to5/transformers/computed-property-names.js b/lib/6to5/transformers/computed-property-names.js
index fa9c03deeb..e8ab042db3 100644
--- a/lib/6to5/transformers/computed-property-names.js
+++ b/lib/6to5/transformers/computed-property-names.js
@@ -1,5 +1,5 @@
 var util = require("../util");
-var b    = require("recast").types.builders;
+var b    = require("ast-types").builders;
 var _    = require("lodash");
 
 exports.ObjectExpression = function (node, parent, file) {
diff --git a/lib/6to5/transformers/destructuring.js b/lib/6to5/transformers/destructuring.js
index 7a3317692c..068fe98556 100644
--- a/lib/6to5/transformers/destructuring.js
+++ b/lib/6to5/transformers/destructuring.js
@@ -1,6 +1,6 @@
 var traverse = require("../traverse");
 var util     = require("../util");
-var b        = require("recast").types.builders;
+var b        = require("ast-types").builders;
 var _        = require("lodash");
 
 var buildVariableAssign = function (kind, id, init) {
diff --git a/lib/6to5/transformers/for-of.js b/lib/6to5/transformers/for-of.js
index b962999689..77912996a6 100644
--- a/lib/6to5/transformers/for-of.js
+++ b/lib/6to5/transformers/for-of.js
@@ -1,5 +1,5 @@
 var util = require("../util");
-var b    = require("recast").types.builders;
+var b    = require("ast-types").builders;
 
 exports.ForOfStatement = function (node, parent, file) {
   var left = node.left;
diff --git a/lib/6to5/transformers/let-scoping.js b/lib/6to5/transformers/let-scoping.js
index cd7a00efdc..e1cfb7dd23 100644
--- a/lib/6to5/transformers/let-scoping.js
+++ b/lib/6to5/transformers/let-scoping.js
@@ -1,6 +1,6 @@
 var traverse = require("../traverse");
 var util     = require("../util");
-var b        = require("recast").types.builders;
+var b        = require("ast-types").builders;
 var _        = require("lodash");
 
 exports.VariableDeclaration = function (node, parent, file) {
diff --git a/lib/6to5/transformers/rest-parameters.js b/lib/6to5/transformers/rest-parameters.js
index 4e146b41c5..c7ccb315a4 100644
--- a/lib/6to5/transformers/rest-parameters.js
+++ b/lib/6to5/transformers/rest-parameters.js
@@ -1,5 +1,5 @@
 var util = require("../util");
-var b    = require("recast").types.builders;
+var b    = require("ast-types").builders;
 
 exports.Function = function (node, parent, file) {
   if (!node.rest) return;
diff --git a/lib/6to5/transformers/spread.js b/lib/6to5/transformers/spread.js
index 9a90a95f7f..26e18163d4 100644
--- a/lib/6to5/transformers/spread.js
+++ b/lib/6to5/transformers/spread.js
@@ -1,5 +1,5 @@
 var util = require("../util");
-var b    = require("recast").types.builders;
+var b    = require("ast-types").builders;
 var _    = require("lodash");
 
 var getSpreadLiteral = function (spread, file) {
diff --git a/lib/6to5/transformers/template-literals.js b/lib/6to5/transformers/template-literals.js
index ed9b4d5f64..20f81f0b00 100644
--- a/lib/6to5/transformers/template-literals.js
+++ b/lib/6to5/transformers/template-literals.js
@@ -1,4 +1,4 @@
-var b = require("recast").types.builders;
+var b = require("ast-types").builders;
 var _ = require("lodash");
 
 var buildBinaryExpression = function (left, right) {
diff --git a/lib/6to5/transformers/unicode-regex.js b/lib/6to5/transformers/unicode-regex.js
index 757e31baf7..0866a4f6fe 100644
--- a/lib/6to5/transformers/unicode-regex.js
+++ b/lib/6to5/transformers/unicode-regex.js
@@ -1,5 +1,5 @@
 var rewritePattern = require("regexpu/rewrite-pattern");
-var b              = require("recast").types.builders;
+var b              = require("ast-types").builders;
 var _              = require("lodash");
 
 exports.Literal = function (node) {
diff --git a/lib/6to5/transformers/use-strict.js b/lib/6to5/transformers/use-strict.js
index 11d682480a..f603a4bffb 100644
--- a/lib/6to5/transformers/use-strict.js
+++ b/lib/6to5/transformers/use-strict.js
@@ -1,4 +1,4 @@
-var b = require("recast").types.builders;
+var b = require("ast-types").builders;
 
 module.exports = function (ast, file) {
   var body = ast.program.body;
diff --git a/lib/6to5/util.js b/lib/6to5/util.js
index 09cd30e33c..58b860135d 100644
--- a/lib/6to5/util.js
+++ b/lib/6to5/util.js
@@ -1,5 +1,5 @@
 var traverse = require("./traverse");
-var astTypes = require("recast").types;
+var astTypes = require("ast-types");
 var recast   = require("recast");
 var acorn    = require("acorn");
 var path     = require("path");