diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6bb9e97d5..c52217c54 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # CocoaPods Core Changelog
 
-## Master
+## 1.5.0.beta.1 (2018-03-23)
 
 ##### Enhancements
 
diff --git a/Gemfile.lock b/Gemfile.lock
index 8e8790377..0bf99b1a0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,7 @@ GIT
 PATH
   remote: .
   specs:
-    cocoapods-core (1.4.0)
+    cocoapods-core (1.5.0.beta.1)
       activesupport (>= 4.0.2, < 6)
       fuzzy_match (~> 2.0.4)
       nap (~> 1.0)
@@ -36,7 +36,7 @@ GEM
     ffi (1.9.18)
     fuzzy_match (2.0.4)
     hashdiff (0.3.4)
-    i18n (0.9.1)
+    i18n (0.9.5)
       concurrent-ruby (~> 1.0)
     kicker (3.0.0)
       listen (~> 1.3.0)
@@ -47,7 +47,7 @@ GEM
       rb-kqueue (>= 0.2)
     metaclass (0.0.4)
     method_source (0.8.2)
-    minitest (5.11.1)
+    minitest (5.11.3)
     mocha (1.2.1)
       metaclass (~> 0.0.1)
     mocha-on-bacon (0.2.3)
@@ -88,7 +88,7 @@ GEM
     simplecov-html (0.9.0)
     slop (3.6.0)
     thread_safe (0.3.6)
-    tzinfo (1.2.4)
+    tzinfo (1.2.5)
       thread_safe (~> 0.1)
     unicode-display_width (1.3.0)
     vcr (3.0.3)
diff --git a/lib/cocoapods-core/gem_version.rb b/lib/cocoapods-core/gem_version.rb
index 740d1e992..d19869e51 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 = '1.4.0'.freeze unless defined? Pod::CORE_VERSION
+  CORE_VERSION = '1.5.0.beta.1'.freeze unless defined? Pod::CORE_VERSION
 end