diff --git a/ext/dbm/dbm.gemspec b/ext/dbm/dbm.gemspec
new file mode 100644
index 0000000000..34797085a4
--- /dev/null
+++ b/ext/dbm/dbm.gemspec
@@ -0,0 +1,17 @@
+Gem::Specification.new do |s|
+  s.name = "dbm"
+  s.version = '0.0.1'
+  s.date = '2017-02-08'
+  s.summary = "Provides a wrapper for the UNIX-style Database Manager Library"
+  s.description = "Provides a wrapper for the UNIX-style Database Manager Library"
+
+  s.require_path = %w{lib}
+  s.files = %w{depend extconf.rb dbm.c}
+  s.extensions = %w{extconf.rb}
+  s.required_ruby_version = ">= 2.5.0dev"
+
+  s.authors = ["Yukihiro Matsumoto"]
+  s.email = ["matz@ruby-lang.org"]
+  s.homepage = "https://www.ruby-lang.org"
+  s.license = "BSD-2-Clause"
+end