diff --git a/Gemfile b/Gemfile
index 2903d67..17fe901 100644
--- a/Gemfile
+++ b/Gemfile
@@ -18,7 +18,7 @@ group :development, :test do
 end
 
 group :style do
-  gem "cookstyle", "~> 8.2"
+  gem "cookstyle", "~> 8.6"
 end
 
 if ENV["GEMFILE_MOD"]
diff --git a/chef-zero.gemspec b/chef-zero.gemspec
index a0a4e31..7bd9a80 100644
--- a/chef-zero.gemspec
+++ b/chef-zero.gemspec
@@ -17,8 +17,8 @@ Gem::Specification.new do |s|
   s.add_dependency "hashie", ">= 2.0", "< 6.0"
   s.add_dependency "uuidtools", ">= 2.1", "< 4.0"
   s.add_dependency "ffi-yajl", ">= 2.2", "< 4.0"
-  s.add_dependency "rack", "~> 3.1", ">= 3.1.16"
-  s.add_dependency "rackup", "~> 2.2", ">= 2.2.1"
+  s.add_dependency "rack", "~> 3.2", ">= 3.2.6"
+  s.add_dependency "rackup", "~> 2.3", ">= 2.3.1"
   s.add_dependency "webrick"
 
   s.bindir       = "bin"