diff --git a/omniauth-remote-user.gemspec b/omniauth-remote-user.gemspec
index a8aeb5e..c491981 100644
--- a/omniauth-remote-user.gemspec
+++ b/omniauth-remote-user.gemspec
@@ -20,7 +20,7 @@ Gem::Specification.new do |gem|
   gem.require_paths = %w(lib)
   gem.files = `git ls-files -z`.split("\x0").reject {|f| f.start_with?('spec/')}
   gem.test_files = `git ls-files -- {test,spec,feature}/*`.split("\n")
-  gem.license = %w(GPLv3)
+  gem.license = "GPLv3"
   gem.required_rubygems_version = '>= 1.3.5'
 end
 
--
libgit2 0.21.2