diff --git a/spree_digital.gemspec b/spree_digital.gemspec
index 34d8cc7..8673dab 100644
--- a/spree_digital.gemspec
+++ b/spree_digital.gemspec
@@ -1,7 +1,7 @@
 Gem::Specification.new do |s|
   s.platform     = Gem::Platform::RUBY
   s.name         = 'spree_digital'
-  s.version      = '0.60.99'
+  s.version      = '1.0.0'
   s.summary      = ''
   s.description  = 'This gem is supposed to be used in connection with spree_core. It was tested with spree_core 0.66.99 but it might work with newer versions as well.'
   s.author       = 'funkensturm.'
@@ -11,5 +11,5 @@ Gem::Specification.new do |s|
   s.require_path = 'lib'
   s.requirements << 'none'
   s.required_ruby_version = '>= 1.8.7'
-  s.add_dependency('spree_core')
+  s.add_dependency('spree_core', '~> 1.0.0')
 end
\ No newline at end of file