diff --git a/ext/digest/digest.gemspec b/ext/digest/digest.gemspec
index 296ee72b1f..4732730d23 100644
--- a/ext/digest/digest.gemspec
+++ b/ext/digest/digest.gemspec
@@ -40,8 +40,4 @@ Gem::Specification.new do |spec|
     ext/digest/sha2/extconf.rb
   ]
   spec.metadata["msys2_mingw_dependencies"] = "openssl"
-
-  spec.add_development_dependency "bundler"
-  spec.add_development_dependency "rake"
-  spec.add_development_dependency "rake-compiler"
 end