diff --git a/smart_proxy_dynflow.gemspec b/smart_proxy_dynflow.gemspec
index 3059e1e..201bd2f 100644
--- a/smart_proxy_dynflow.gemspec
+++ b/smart_proxy_dynflow.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |gem|
                           'LICENSE', 'Gemfile']
   gem.test_files    = gem.files.grep(%r{^(test|spec|features)/})
   gem.require_paths = ["lib"]
-  gem.license = 'GPL-3.0'
+  gem.license = 'GPL-3.0-only'
 
   gem.required_ruby_version = '>= 2.7', '< 4'