diff --git a/core/spree_core.gemspec b/core/spree_core.gemspec
index 3d154e09069..27fc50d96da 100644
--- a/core/spree_core.gemspec
+++ b/core/spree_core.gemspec
@@ -43,7 +43,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'highline', '~> 2.0' # Necessary for the install generator
   s.add_dependency 'kaminari', '~> 1.2'
   s.add_dependency 'money', '~> 6.13'
-  s.add_dependency 'monetize', '~> 1.9'
+  s.add_dependency 'monetize', '>= 1.9', '< 3.0'
   s.add_dependency 'paranoia', '~> 2.4'
   s.add_dependency 'ransack', '>= 2.3', '< 4.0'
   s.add_dependency 'rexml'