diff --git a/Gemfile b/Gemfile
index ae9d70328..f16e23bed 100644
--- a/Gemfile
+++ b/Gemfile
@@ -2,7 +2,7 @@
 # If you modify this file manually all comments and formatting will be lost.
 
 source "https://rubygems.org"
-gem "logstash-core", "3.0.0.dev", :path => "."
+gem "logstash-core", "2.0.0.dev", :path => "."
 gem "file-dependencies", "0.1.6"
 gem "ci_reporter_rspec", "1.0.0", :group => :development
 gem "simplecov", :group => :development
diff --git a/lib/logstash/version.rb b/lib/logstash/version.rb
index 17a5cd8c1..36f2bad27 100644
--- a/lib/logstash/version.rb
+++ b/lib/logstash/version.rb
@@ -1,6 +1,6 @@
 # encoding: utf-8
 # The version of logstash.
-LOGSTASH_VERSION = "3.0.0.dev"
+LOGSTASH_VERSION = "2.0.0.dev"
 
 # Note to authors: this should not include dashes because 'gem' barfs if
 # you include a dash in the version string.