diff --git a/pronto.gemspec b/pronto.gemspec
index 386ce171..2c580ae0 100644
--- a/pronto.gemspec
+++ b/pronto.gemspec
@@ -40,11 +40,11 @@ Gem::Specification.new do |s|
   s.require_paths = ['lib']
   s.executables = s.files.grep(%r{^bin/}) { |f| File.basename(f) }
 
-  s.add_runtime_dependency('gitlab', '~> 4.4', '>= 4.4.0')
-  s.add_runtime_dependency('httparty', '>= 0.13.7')
-  s.add_runtime_dependency('octokit', '~> 4.7', '>= 4.7.0')
+  s.add_runtime_dependency('gitlab', '>= 4.4.0', '< 5.0')
+  s.add_runtime_dependency('httparty', '>= 0.13.7', '< 1.0')
+  s.add_runtime_dependency('octokit', '>= 4.7.0', '< 7.0')
   s.add_runtime_dependency('rainbow', '>= 2.2', '< 4.0')
-  s.add_runtime_dependency('rexml', '~> 3.2', '>= 3.2.5')
+  s.add_runtime_dependency('rexml', '>= 3.2.5', '< 4.0')
   s.add_runtime_dependency('rugged', '>= 0.23.0', '< 2.0')
   s.add_runtime_dependency('thor', '>= 0.20.3', '< 2.0')
   s.add_development_dependency('bundler', '>= 1.15')