hanami-assets.gemspec in hanami-assets-1.3.0 vs hanami-assets.gemspec in hanami-assets-1.3.1

@@ -22,10 +22,10 @@
 
   spec.add_runtime_dependency 'hanami-utils',    '~> 1.3'
   spec.add_runtime_dependency 'hanami-helpers',  '~> 1.3'
   spec.add_runtime_dependency 'tilt',            '~> 2.0', '>= 2.0.2'
 
-  spec.add_development_dependency 'bundler'
+  spec.add_development_dependency 'bundler',          '>= 1.6', '< 3'
   spec.add_development_dependency 'rake',             '~> 12.0'
   spec.add_development_dependency 'rspec',            '~> 3.7'
 
   spec.add_development_dependency 'yui-compressor',   '~> 0.12'
   spec.add_development_dependency 'uglifier',         '~> 2.7'