diff --git a/the_moderator.gemspec b/the_moderator.gemspec
index af09a42..11b76cc 100644
--- a/the_moderator.gemspec
+++ b/the_moderator.gemspec
@@ -18,15 +18,14 @@ Gem::Specification.new do |spec|
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
 
-  spec.add_dependency "activemodel", ">= 3.2.0"
-  spec.add_dependency "activerecord", ">= 3.2.0"
-  spec.add_dependency "activesupport", ">= 3.2.0"
+  spec.add_dependency "activemodel", ">= 3.2.0", "< 5.0"
+  spec.add_dependency "activerecord", ">= 3.2.0", "< 5.0"
+  spec.add_dependency "activesupport", ">= 3.2.0", "< 5.0"
 
   spec.add_development_dependency "bundler", "~> 1.3"
-  spec.add_development_dependency "rake"
+  spec.add_development_dependency "rake", "~> 10.3"
 
-  spec.add_development_dependency "rspec", "~> 2.14.0"
-  spec.add_development_dependency "combustion", "~> 0.5.0"
-  spec.add_development_dependency "sqlite3"
-  spec.add_development_dependency "pry"
+  spec.add_development_dependency "rspec", "~> 2.14"
+  spec.add_development_dependency "combustion", "~> 0.5"
+  spec.add_development_dependency "sqlite3", "~> 1.3"
 end