diff --git a/lerna.json b/lerna.json
index 63f532ad..db441e24 100644
--- a/lerna.json
+++ b/lerna.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.20.0",
+  "version": "0.21.0",
   "lerna": "2.0.0-rc.5",
   "npmClient": "yarn",
   "packages": [
diff --git a/packages/metro-bundler/package.json b/packages/metro-bundler/package.json
index 853d6098..5d1938a8 100644
--- a/packages/metro-bundler/package.json
+++ b/packages/metro-bundler/package.json
@@ -1,5 +1,5 @@
 {
-  "version": "0.20.0",
+  "version": "0.21.0",
   "name": "metro-bundler",
   "description": "🚇 The JavaScript bundler for React Native.",
   "main": "src/index.js",
diff --git a/packages/metro-bundler/src/Server/index.js b/packages/metro-bundler/src/Server/index.js
index 01699a56..deeb98f0 100644
--- a/packages/metro-bundler/src/Server/index.js
+++ b/packages/metro-bundler/src/Server/index.js
@@ -98,7 +98,6 @@ export type Options = {|
   +sourceExts: ?Array<string>,
   +transformCache: TransformCache,
   transformModulePath?: string,
-  useDeltaBundler?: boolean, // TODO: remove this, since it's no longer used
   watch?: boolean,
   workerPath: ?string,
 |};