diff --git a/tasks/gem.rake b/tasks/gem.rake
index d76de1938..0dbe47aa3 100644
--- a/tasks/gem.rake
+++ b/tasks/gem.rake
@@ -20,10 +20,10 @@ namespace :gem do
     s.rdoc_options.concat ['--main',  'README']
 
     # Dependencies used in the main library
-    s.add_runtime_dependency('signet', '~> 0.2.1')
+    s.add_runtime_dependency('signet', '~> 0.2.2')
     s.add_runtime_dependency('addressable', '~> 2.2.2')
     s.add_runtime_dependency('httpadapter', '~> 1.0.0')
-    s.add_runtime_dependency('json', '>= 1.5.1')
+    s.add_runtime_dependency('json', '>= 1.4.6')
     s.add_runtime_dependency('extlib', '>= 0.9.15')
 
     # Dependencies used in the CLI