diff --git a/packages/accounts-base/package.js b/packages/accounts-base/package.js
index 187699576e..8006f29ef5 100644
--- a/packages/accounts-base/package.js
+++ b/packages/accounts-base/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "A user account system",
-  version: "1.2.8"
+  version: "1.2.9-beta.0"
 });
 
 Package.onUse(function (api) {
diff --git a/packages/accounts-twitter/package.js b/packages/accounts-twitter/package.js
index 3894997db8..98bf5c6461 100644
--- a/packages/accounts-twitter/package.js
+++ b/packages/accounts-twitter/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Login service for Twitter accounts",
-  version: "1.0.10"
+  version: "1.1.11-beta.0"
 });
 
 Package.onUse(function(api) {
diff --git a/packages/babel-compiler/package.js b/packages/babel-compiler/package.js
index c40bcb4ee0..fba9744dc4 100644
--- a/packages/babel-compiler/package.js
+++ b/packages/babel-compiler/package.js
@@ -6,7 +6,7 @@ Package.describe({
   // isn't possible because you can't publish a non-recommended
   // release with package versions that don't have a pre-release
   // identifier at the end (eg, -dev)
-  version: '6.8.3'
+  version: '6.8.4-beta.0'
 });
 
 Npm.depends({
diff --git a/packages/babel-runtime/package.js b/packages/babel-runtime/package.js
index 5999385441..c7472c5b92 100644
--- a/packages/babel-runtime/package.js
+++ b/packages/babel-runtime/package.js
@@ -1,7 +1,7 @@
 Package.describe({
   name: "babel-runtime",
   summary: "Runtime support for output of Babel transpiler",
-  version: '0.1.9_1',
+  version: '0.1.10-beta.0',
   documentation: 'README.md'
 });
 
diff --git a/packages/caching-compiler/package.js b/packages/caching-compiler/package.js
index 92240494ee..7a92259e69 100644
--- a/packages/caching-compiler/package.js
+++ b/packages/caching-compiler/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   name: 'caching-compiler',
-  version: '1.0.5_1',
+  version: '1.0.6-beta.0',
   summary: 'An easy way to make compiler plugins cache',
   documentation: 'README.md'
 });
diff --git a/packages/coffeescript/package.js b/packages/coffeescript/package.js
index a6112a6d46..9f0331a877 100644
--- a/packages/coffeescript/package.js
+++ b/packages/coffeescript/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Javascript dialect with fewer braces and semicolons",
-  version: "1.1.2_1"
+  version: "1.1.3-beta.0"
 });
 
 Package.registerBuildPlugin({
diff --git a/packages/ddp-client/package.js b/packages/ddp-client/package.js
index cc0cb2a6d3..4b1ad9ad9e 100644
--- a/packages/ddp-client/package.js
+++ b/packages/ddp-client/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Meteor's latency-compensated distributed data client",
-  version: '1.3.0',
+  version: '1.3.0-beta.0',
   documentation: null
 });
 
diff --git a/packages/ddp-server/package.js b/packages/ddp-server/package.js
index 433ead690f..096f9c5d13 100644
--- a/packages/ddp-server/package.js
+++ b/packages/ddp-server/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Meteor's latency-compensated distributed data server",
-  version: '1.2.8_1',
+  version: '1.2.9-beta.0',
   documentation: null
 });
 
diff --git a/packages/ecmascript-runtime/package.js b/packages/ecmascript-runtime/package.js
index 94724afa6e..956756c3e3 100644
--- a/packages/ecmascript-runtime/package.js
+++ b/packages/ecmascript-runtime/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   name: "ecmascript-runtime",
-  version: "0.2.11_1",
+  version: "0.2.12-beta.0",
   summary: "Polyfills for new ECMAScript 2015 APIs like Map and Set",
   git: "https://github.com/meteor/ecmascript-runtime",
   documentation: "README.md"
diff --git a/packages/ecmascript/package.js b/packages/ecmascript/package.js
index 6a23de12a7..d71dccc652 100644
--- a/packages/ecmascript/package.js
+++ b/packages/ecmascript/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   name: 'ecmascript',
-  version: '0.4.6_1',
+  version: '0.4.7-beta.0',
   summary: 'Compiler plugin that supports ES2015+ in all .js files',
   documentation: 'README.md'
 });
diff --git a/packages/email/package.js b/packages/email/package.js
index 09d05445ca..79f92b0fff 100644
--- a/packages/email/package.js
+++ b/packages/email/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Send email messages",
-  version: "1.0.14_1"
+  version: "1.0.15-beta.0"
 });
 
 Npm.depends({
diff --git a/packages/es5-shim/package.js b/packages/es5-shim/package.js
index d864fa2ca9..fb8f6c7cb5 100644
--- a/packages/es5-shim/package.js
+++ b/packages/es5-shim/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   name: "es5-shim",
-  version: "4.5.12_1",
+  version: "4.5.13-beta.0",
   summary: "Shims and polyfills to improve ECMAScript 5 support",
   documentation: "README.md"
 });
diff --git a/packages/http/package.js b/packages/http/package.js
index 825793ef26..9180a714bc 100644
--- a/packages/http/package.js
+++ b/packages/http/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Make HTTP calls to remote servers",
-  version: '1.1.7'
+  version: '1.1.8-beta.0'
 });
 
 Npm.depends({
diff --git a/packages/jshint/package.js b/packages/jshint/package.js
index 6409f12e66..fc7e1cf1a1 100644
--- a/packages/jshint/package.js
+++ b/packages/jshint/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   name: 'jshint',
-  version: '1.0.4_1',
+  version: '1.0.5-beta.0',
   summary: 'Lint all your JavaScript files with JSHint.',
   documentation: 'README.md'
 });
diff --git a/packages/less/package.js b/packages/less/package.js
index 5e5cc5a476..7ffea65cf7 100644
--- a/packages/less/package.js
+++ b/packages/less/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   name: 'less',
-  version: '2.6.3_1',
+  version: '2.6.4-beta.0',
   summary: 'Leaner CSS language',
   documentation: 'README.md'
 });
diff --git a/packages/logging/package.js b/packages/logging/package.js
index 45bb224d4b..b7fa40fbf8 100644
--- a/packages/logging/package.js
+++ b/packages/logging/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Logging facility.",
-  version: '1.0.13_1'
+  version: '1.0.14-beta.0'
 });
 
 Npm.depends({
diff --git a/packages/meteor-tool/package.js b/packages/meteor-tool/package.js
index 93093b54c6..7faa85ef97 100644
--- a/packages/meteor-tool/package.js
+++ b/packages/meteor-tool/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "The Meteor command-line tool",
-  version: '1.3.4_1'
+  version: '1.4.0-beta.0'
 });
 
 Package.includeTool();
diff --git a/packages/meteor/package.js b/packages/meteor/package.js
index 5b1b1d8bd9..2ac386823b 100644
--- a/packages/meteor/package.js
+++ b/packages/meteor/package.js
@@ -2,7 +2,7 @@
 
 Package.describe({
   summary: "Core Meteor environment",
-  version: '1.1.15_1'
+  version: '1.1.16-beta.0'
 });
 
 Package.registerBuildPlugin({
diff --git a/packages/minifier-css/package.js b/packages/minifier-css/package.js
index aaf9d3ed27..f3857f05af 100644
--- a/packages/minifier-css/package.js
+++ b/packages/minifier-css/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "CSS minifier",
-  version: "1.1.12_1"
+  version: "1.1.13-beta.0"
 });
 
 Npm.depends({
diff --git a/packages/minifier-js/package.js b/packages/minifier-js/package.js
index 5bb8902e4a..457377afb7 100644
--- a/packages/minifier-js/package.js
+++ b/packages/minifier-js/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "JavaScript minifier",
-  version: "1.1.12_1"
+  version: "1.1.13-beta.0"
 });
 
 Npm.depends({
diff --git a/packages/modules-runtime/package.js b/packages/modules-runtime/package.js
index e2651c7211..fb9fba8a8b 100644
--- a/packages/modules-runtime/package.js
+++ b/packages/modules-runtime/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   name: "modules-runtime",
-  version: "0.6.4_1",
+  version: "0.6.5-beta.0",
   summary: "CommonJS module system",
   git: "https://github.com/benjamn/install",
   documentation: "README.md"
diff --git a/packages/modules/package.js b/packages/modules/package.js
index f445ac250c..91ad87b03b 100644
--- a/packages/modules/package.js
+++ b/packages/modules/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   name: "modules",
-  version: "0.6.4",
+  version: "0.6.5-beta.0",
   summary: "CommonJS module system",
   documentation: "README.md"
 });
diff --git a/packages/mongo/package.js b/packages/mongo/package.js
index d6eb2342d0..d9d1d5d01c 100644
--- a/packages/mongo/package.js
+++ b/packages/mongo/package.js
@@ -9,7 +9,7 @@
 
 Package.describe({
   summary: "Adaptor for using MongoDB and Minimongo over DDP",
-  version: '1.1.9_1'
+  version: '1.1.10-beta.0'
 });
 
 Npm.depends({
diff --git a/packages/npm-mongo/package.js b/packages/npm-mongo/package.js
index fded6dead0..336e5114f5 100644
--- a/packages/npm-mongo/package.js
+++ b/packages/npm-mongo/package.js
@@ -3,7 +3,7 @@
 
 Package.describe({
   summary: "Wrapper around the mongo npm package",
-  version: '1.4.44_1',
+  version: '1.4.45-beta.0',
   documentation: null
 });
 
diff --git a/packages/oauth-encryption/package.js b/packages/oauth-encryption/package.js
index cdc642e184..55f0fbb4df 100644
--- a/packages/oauth-encryption/package.js
+++ b/packages/oauth-encryption/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Encrypt account secrets stored in the database",
-  version: '1.0.13'
+  version: '1.0.13-beta.0'
 });
 
 Package.onUse(function (api) {
diff --git a/packages/promise/package.js b/packages/promise/package.js
index 189d24f428..7ec5342472 100644
--- a/packages/promise/package.js
+++ b/packages/promise/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   name: "promise",
-  version: "0.7.2_1",
+  version: "0.7.3-beta.0",
   summary: "ECMAScript 2015 Promise polyfill with Fiber support",
   git: "https://github.com/meteor/promise",
   documentation: "README.md"
diff --git a/packages/standard-minifier-css/package.js b/packages/standard-minifier-css/package.js
index 5600f5fb95..7b3b5f6aa9 100644
--- a/packages/standard-minifier-css/package.js
+++ b/packages/standard-minifier-css/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   name: 'standard-minifier-css',
-  version: '1.0.7_1',
+  version: '1.0.8-beta.0',
   summary: 'Standard css minifier used with Meteor apps by default.',
   documentation: 'README.md'
 });
diff --git a/packages/standard-minifier-js/package.js b/packages/standard-minifier-js/package.js
index d10d2a480b..a50f71666b 100644
--- a/packages/standard-minifier-js/package.js
+++ b/packages/standard-minifier-js/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   name: 'standard-minifier-js',
-  version: '1.0.7_1',
+  version: '1.0.8-beta.0',
   summary: 'Standard javascript minifiers used with Meteor apps by default.',
   documentation: 'README.md'
 });
diff --git a/packages/static-html/package.js b/packages/static-html/package.js
index c09b5d2489..991791374d 100644
--- a/packages/static-html/package.js
+++ b/packages/static-html/package.js
@@ -1,5 +1,5 @@
 Package.describe({
-  version: '1.0.10_1',
+  version: '1.0.11-beta.0',
   // Brief, one-line summary of the package.
   summary: 'Define static page content in .html files',
   git: 'https://github.com/meteor/meteor',
diff --git a/packages/stylus/package.js b/packages/stylus/package.js
index 6d5a7f2275..c02c671196 100644
--- a/packages/stylus/package.js
+++ b/packages/stylus/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: 'Expressive, dynamic, robust CSS',
-  version: "2.512.3_1"
+  version: "2.512.4-beta.0"
 });
 
 Package.registerBuildPlugin({
diff --git a/packages/templating/package.js b/packages/templating/package.js
index 16e65aa0ee..a43b0a6b90 100644
--- a/packages/templating/package.js
+++ b/packages/templating/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Allows templates to be defined in .html files",
-  version: '1.1.12_1'
+  version: '1.1.13-beta.0'
 });
 
 // Today, this package is closely intertwined with Handlebars, meaning
diff --git a/packages/twitter/package.js b/packages/twitter/package.js
index 0c461ddbe4..52385c18c3 100644
--- a/packages/twitter/package.js
+++ b/packages/twitter/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Twitter OAuth flow",
-  version: '1.1.11'
+  version: '1.1.12-beta.0'
 });
 
 Package.onUse(function(api) {
diff --git a/packages/webapp/package.js b/packages/webapp/package.js
index b30bf0fbfc..39f77abd0b 100644
--- a/packages/webapp/package.js
+++ b/packages/webapp/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "Serves a Meteor app over HTTP",
-  version: '1.2.9_1'
+  version: '1.2.10-beta.0'
 });
 
 Npm.depends({connect: "2.30.2",
diff --git a/packages/xmlbuilder/package.js b/packages/xmlbuilder/package.js
index 500938e317..d3e9f0fe25 100644
--- a/packages/xmlbuilder/package.js
+++ b/packages/xmlbuilder/package.js
@@ -1,6 +1,6 @@
 Package.describe({
   summary: "An XML builder for node.js similar to java-xmlbuilder.",
-  version: '2.4.12_1'
+  version: '2.4.13-beta.0'
 });
 
 Npm.depends({
diff --git a/scripts/admin/meteor-release-experimental.json b/scripts/admin/meteor-release-experimental.json
index c98c9733a2..65463c3296 100644
--- a/scripts/admin/meteor-release-experimental.json
+++ b/scripts/admin/meteor-release-experimental.json
@@ -1,6 +1,6 @@
 {
  "track": "METEOR",
- "version": "1.3.4.1-rc.0",
+ "version": "1.4-beta.0",
  "recommended": false,
  "official": false,
  "description": "Meteor"