diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2283eb50d..310ffbe6c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # CocoaPods Core Changelog
 
-## Master
+## 1.3.0.beta.1 (2017-06-06)
 
 ##### Enhancements
 
diff --git a/Gemfile.lock b/Gemfile.lock
index d248233bc..7503f054b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,7 @@ GIT
 PATH
   remote: .
   specs:
-    cocoapods-core (1.2.1)
+    cocoapods-core (1.3.0.beta.1)
       activesupport (>= 4.0.2, < 6)
       fuzzy_match (~> 2.0.4)
       nap (~> 1.0)
@@ -35,7 +35,7 @@ GEM
     ffi (1.9.6)
     fuzzy_match (2.0.4)
     hashdiff (0.3.1)
-    i18n (0.8.1)
+    i18n (0.8.4)
     kicker (3.0.0)
       listen (~> 1.3.0)
       notify (~> 0.5.2)
diff --git a/lib/cocoapods-core/gem_version.rb b/lib/cocoapods-core/gem_version.rb
index a12299e6a..0c717c7c8 100644
--- a/lib/cocoapods-core/gem_version.rb
+++ b/lib/cocoapods-core/gem_version.rb
@@ -1,5 +1,5 @@
 module Pod
   # The version of the cocoapods-core.
   #
-  CORE_VERSION = '1.2.1'.freeze unless defined? Pod::CORE_VERSION
+  CORE_VERSION = '1.3.0.beta.1'.freeze unless defined? Pod::CORE_VERSION
 end