diff --git a/alchemy-solidus.gemspec b/alchemy-solidus.gemspec
index ef86bd8..cf40243 100644
--- a/alchemy-solidus.gemspec
+++ b/alchemy-solidus.gemspec
@@ -13,9 +13,9 @@ Gem::Specification.new do |gem|
   gem.require_paths = ["lib"]
   gem.version       = Alchemy::Solidus::VERSION
 
-  gem.add_dependency('alchemy_cms', ['>= 4.1.0', '< 6.0'])
-  gem.add_dependency('solidus_core', ['>= 2.6.0', '< 3.0'])
-  gem.add_dependency('solidus_backend', ['>= 2.6.0', '< 3.0'])
+  gem.add_dependency('alchemy_cms', ['>= 5.0.0', '< 6.0'])
+  gem.add_dependency('solidus_core', ['>= 3.0', '< 3.1'])
+  gem.add_dependency('solidus_backend', ['>= 3.0', '< 3.1'])
   gem.add_dependency('solidus_support', ['>= 0.1.1'])
   gem.add_dependency('deface', ['~> 1.0'])