diff --git a/re2.gemspec b/re2.gemspec
index a4814c4..78f35d2 100644
--- a/re2.gemspec
+++ b/re2.gemspec
@@ -40,8 +40,8 @@ Gem::Specification.new do |s|
     "spec/re2/set_spec.rb",
     "spec/re2/scanner_spec.rb"
   ]
-  s.add_development_dependency("rake-compiler", "~> 1.2.5")
-  s.add_development_dependency("rake-compiler-dock", "~> 1.4.0")
+  s.add_development_dependency("rake-compiler", "~> 1.2.7")
+  s.add_development_dependency("rake-compiler-dock", "~> 1.5.0")
   s.add_development_dependency("rspec", "~> 3.2")
   s.add_runtime_dependency("mini_portile2", "~> 2.8.6") # keep version in sync with extconf.rb
 end