diff --git a/README.md b/README.md
index 057c2d5..9bc70e1 100644
--- a/README.md
+++ b/README.md
@@ -184,7 +184,6 @@ PSD.debug = true
 
 There are a few features that are currently missing from PSD.rb.
 
-* Global layer mask
 * Individual layer image exporting
 * More image modes + depths for image exporting
 * A few layer info blocks
diff --git a/lib/psd/version.rb b/lib/psd/version.rb
index a7e94ad..84b5983 100644
--- a/lib/psd/version.rb
+++ b/lib/psd/version.rb
@@ -1,3 +1,3 @@
 class PSD
-  VERSION = "0.4.2"
+  VERSION = "1.0.0"
 end
diff --git a/psd.gemspec b/psd.gemspec
index c58fb22..d88a448 100644
--- a/psd.gemspec
+++ b/psd.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |gem|
 
   gem.add_dependency "bindata"
   gem.add_dependency "oily_png"
-  gem.add_dependency 'psd-enginedata'
+  gem.add_dependency 'psd-enginedata', '~> 1.0'
 
   gem.test_files = Dir.glob("spec/**/*")
   gem.add_development_dependency 'rspec'