diff --git a/CHANGELOG.md b/CHANGELOG.md
index b55d851e13..2b98654b41 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,11 @@ _Note: Gaps between patch versions are faulty, broken or test releases._
 
 See [CHANGELOG - 6to5](CHANGELOG-6to5.md) for the pre-4.0.0 version changelog.
 
+## 5.7.1
+
+ * **Bug Fix**
+  * Add back mistakenly removed `replaceWithSourceString` method.
+
 ## 5.7.0
 
  * **Bug Fix**
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1c3dd1b3b8..1e6e5c1909 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -7,12 +7,6 @@
    |
    <strong><a href="#running-tests">Running tests</a></strong>
    |
-   <strong><a href="#workflow">Workflow</a></strong>
-   |
-   <strong><a href="#dependencies">Dependencies</a></strong>
-   |
-   <strong><a href="#code-standards">Code Standards</a></strong>
-   |
    <strong><a href="#internals">Internals</a></strong>
 </p>
 
@@ -26,6 +20,8 @@ contributing, please read the
 
 ## Developing
 
+**Note:** Versions `< 5.1.10` can't be built.
+
 #### Setup
 
 ```sh
diff --git a/VERSION b/VERSION
index 3b867ccd76..262122f679 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-5.7.0
\ No newline at end of file
+5.7.1
\ No newline at end of file
diff --git a/packages/babel/package.json b/packages/babel/package.json
index d70573a566..052fe85c44 100644
--- a/packages/babel/package.json
+++ b/packages/babel/package.json
@@ -1,6 +1,6 @@
 {
   "name": "babel-core",
-  "version": "5.7.0",
+  "version": "5.7.1",
   "description": "A compiler for writing next generation JavaScript",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",
@@ -42,7 +42,7 @@
     "babel-plugin-runtime": "^1.0.7",
     "babel-plugin-undeclared-variables-check": "^1.0.2",
     "babel-plugin-undefined-to-void": "^1.1.6",
-    "babylon": "^5.6.23",
+    "babylon": "^5.7.1",
     "bluebird": "^2.9.33",
     "chalk": "^1.0.0",
     "convert-source-map": "^1.1.0",
diff --git a/packages/babel/src/traversal/path/replacement.js b/packages/babel/src/traversal/path/replacement.js
index 262a5afa5b..16bda31e7a 100644
--- a/packages/babel/src/traversal/path/replacement.js
+++ b/packages/babel/src/traversal/path/replacement.js
@@ -1,4 +1,7 @@
+import codeFrame from "../../helpers/code-frame";
+import traverse from "../index";
 import NodePath from "./index";
+import parse from "../../helpers/parse";
 import * as t from "../../types";
 
 /**
@@ -60,11 +63,31 @@ export function replaceWithMultiple(nodes: Array<Object>) {
 }
 
 /**
- * DEPRECATED
+ * Parse a string as an expression and replace the current node with the result.
+ *
+ * NOTE: This is typically not a good idea to use. Building source strings when
+ * transforming ASTs is an antipattern and SHOULD NOT be encouraged. Even if it's
+ * easier to use, your transforms will be extremely brittle.
  */
 
 export function replaceWithSourceString(replacement) {
-  throw new Error("TODO");
+  this.resync();
+
+  try {
+    replacement = `(${replacement})`;
+    replacement = parse(replacement);
+  } catch (err) {
+    var loc = err.loc;
+    if (loc) {
+      err.message += " - make sure this is an expression.";
+      err.message += "\n" + codeFrame(replacement, loc.line, loc.column + 1);
+    }
+    throw err;
+  }
+
+  replacement = replacement.program.body[0].expression;
+  traverse.removeProperties(replacement);
+  return this.replaceWith(replacement);
 }
 
 /**
diff --git a/packages/babel/test/path.js b/packages/babel/test/path.js
new file mode 100644
index 0000000000..e203c55c9d
--- /dev/null
+++ b/packages/babel/test/path.js
@@ -0,0 +1,23 @@
+var transform = require("../lib/transformation");
+var Plugin    = require("../lib/transformation/plugin");
+var babel     = require("../lib/api/node");
+var chai      = require("chai");
+
+suite("traversal path", function () {
+  test("replaceWithSourceString", function () {
+    var expectCode = "function foo() {}";
+
+    var actualCode = transform(expectCode, {
+      blacklist: "strict",
+      plugins: [new Plugin("foobar", {
+        visitor: {
+          FunctionDeclaration: function () {
+            this.replaceWithSourceString("console.whatever()");
+          }
+        }
+      })]
+    }).code;
+
+    chai.expect(actualCode).to.be.equal("console.whatever();");
+  });
+});
diff --git a/packages/babylon/package.json b/packages/babylon/package.json
index 392ca5d5d2..a2aa542051 100644
--- a/packages/babylon/package.json
+++ b/packages/babylon/package.json
@@ -1,6 +1,6 @@
 {
   "name": "babylon",
-  "version": "5.6.23",
+  "version": "5.7.1",
   "description": "",
   "author": "Sebastian McKenzie <sebmck@gmail.com>",
   "homepage": "https://babeljs.io/",