diff --git a/ext/openssl/openssl.gemspec b/ext/openssl/openssl.gemspec
index 471a3c4265..f178e7025d 100644
--- a/ext/openssl/openssl.gemspec
+++ b/ext/openssl/openssl.gemspec
@@ -17,10 +17,5 @@ Gem::Specification.new do |spec|
 
   spec.required_ruby_version = ">= 2.3.0"
 
-  spec.add_development_dependency "rake"
-  spec.add_development_dependency "rake-compiler"
-  spec.add_development_dependency "test-unit", "~> 3.0"
-  spec.add_development_dependency "rdoc"
-
   spec.metadata["msys2_mingw_dependencies"] = "openssl"
 end