diff --git a/Rakefile b/Rakefile
index 2ec6560..6cdb86f 100644
--- a/Rakefile
+++ b/Rakefile
@@ -29,7 +29,7 @@ cross_platforms = %w[
   x86_64-linux
 ].freeze
 
-ENV['RUBY_CC_VERSION'] = %w[3.3.0 3.2.0 3.1.0 3.0.0 2.7.0 2.6.0].join(':')
+ENV['RUBY_CC_VERSION'] = %w[3.3.5 3.2.0 3.1.0 3.0.0 2.7.0 2.6.0].join(':')
 
 Gem::PackageTask.new(re2_gemspec).define
 
diff --git a/re2.gemspec b/re2.gemspec
index 39f49d3..1a3265d 100644
--- a/re2.gemspec
+++ b/re2.gemspec
@@ -41,7 +41,7 @@ Gem::Specification.new do |s|
     "spec/re2/scanner_spec.rb"
   ]
   s.add_development_dependency("rake-compiler", "~> 1.2.7")
-  s.add_development_dependency("rake-compiler-dock", "~> 1.5.2")
+  s.add_development_dependency("rake-compiler-dock", "~> 1.6.0")
   s.add_development_dependency("rspec", "~> 3.2")
   s.add_runtime_dependency("mini_portile2", "~> 2.8.7") # keep version in sync with extconf.rb
 end