diff --git a/Gemfile.lock b/Gemfile.lock
index 839faadde..4a37d0e03 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,7 +18,7 @@ GIT
 PATH
   remote: .
   specs:
-    xcodeproj (0.12.0)
+    xcodeproj (0.13.0)
       activesupport (~> 3.0)
       colored (~> 1.2)
 
diff --git a/lib/xcodeproj/gem_version.rb b/lib/xcodeproj/gem_version.rb
index e54b9fbb5..3f97376dd 100644
--- a/lib/xcodeproj/gem_version.rb
+++ b/lib/xcodeproj/gem_version.rb
@@ -1,6 +1,6 @@
 module Xcodeproj
   # The version of the xcodeproj gem.
   #
-  VERSION = '0.12.0' unless defined? Xcodeproj::VERSION
+  VERSION = '0.13.0' unless defined? Xcodeproj::VERSION
 end