diff --git a/ncaa.gemspec b/ncaa.gemspec
index 3fe1065..2285b06 100644
--- a/ncaa.gemspec
+++ b/ncaa.gemspec
@@ -24,10 +24,10 @@ Gem::Specification.new do |spec|
   spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
   spec.require_paths = ['lib']
 
-  spec.add_dependency 'activesupport', '~> 5.1'
-  spec.add_dependency 'multi_json',    '~> 1.13'
-  spec.add_dependency 'nokogiri',      '~> 1.10'
-  spec.add_dependency 'rest-client',   '~> 2.0'
+  spec.add_dependency 'activesupport', '>= 5.1'
+  spec.add_dependency 'multi_json',    '>= 1.13'
+  spec.add_dependency 'nokogiri',      '>= 1.10'
+  spec.add_dependency 'rest-client',   '>= 2.0'
 
   spec.add_development_dependency 'bundler',    '~> 1.16'
   spec.add_development_dependency 'pry',        '~> 0.11'