diff --git a/middleman.gemspec b/middleman.gemspec
index bed45bfb..f726a2b5 100644
--- a/middleman.gemspec
+++ b/middleman.gemspec
@@ -23,12 +23,12 @@ Gem::Specification.new do |s|
   s.add_runtime_dependency("thor", ["~> 0.14.0"])
   s.add_runtime_dependency("tilt", ["~> 1.3.1"])
   s.add_runtime_dependency("rdiscount", ["~> 1.6.8"])
-  s.add_runtime_dependency("sinatra", ["~> 1.2.0"])
-  s.add_runtime_dependency("padrino-core", ["~> 0.9.23"])
-  s.add_runtime_dependency("padrino-helpers", ["~> 0.9.23"])
+  s.add_runtime_dependency("sinatra", ["~> 1.2.6"])
+  s.add_runtime_dependency("padrino-core", ["~> 0.10.0"])
+  s.add_runtime_dependency("padrino-helpers", ["~> 0.10.0"])
   s.add_runtime_dependency("rack-test", ["~> 0.5.0"])
   s.add_runtime_dependency("uglifier", ["~> 0.5.0"])
-  s.add_runtime_dependency("slim", ["~> 1.0.0"])
+  s.add_runtime_dependency("slim", ["~> 0.9.0"])
   s.add_runtime_dependency("haml", ["~> 3.1.0"])
   s.add_runtime_dependency("sass", ["~> 3.1.5"])
   s.add_runtime_dependency("coffee-script", ["~> 2.2.0"])