diff --git a/schleuder-cli.gemspec b/schleuder-cli.gemspec
index 53d57f18b9aea49f79daa0cbed77fce028617ddb..006930bf361b3d35faa724a1efdd18d47a553129 100644
--- a/schleuder-cli.gemspec
+++ b/schleuder-cli.gemspec
@@ -19,7 +19,7 @@ Gem::Specification.new do |s|
   # TODO: extend/replace expired cert
   #s.signing_key = "#{ENV['HOME']}/.gem/schleuder-gem-private_key.pem"
   #s.cert_chain  = ['gem-public_cert.pem']
-  s.license = 'GPL-3.0'
+  s.license = 'GPL-3.0-only'
   s.add_runtime_dependency 'thor', '~> 1'
   if Gem::Version.new(RUBY_VERSION) >= Gem::Version.new("3.3.0")
     s.add_runtime_dependency 'base64', '~> 0.2.0'