cinnamon_serial.gemspec in cinnamon_serial-2.0.0 vs cinnamon_serial.gemspec in cinnamon_serial-2.1.0

@@ -19,9 +19,9 @@
   s.homepage    = 'https://github.com/bluemarblepayroll/cinnamon_serial'
   s.license     = 'MIT'
 
   s.required_ruby_version = '>= 2.3.1'
 
-  s.add_development_dependency('pry')
-  s.add_development_dependency('rspec')
+  s.add_development_dependency('pry', '~> 0.11')
+  s.add_development_dependency('rspec', '~> 3.8')
   s.add_development_dependency('rubocop', '~> 0.59.2')
 end