diff --git a/ext/dbm/dbm.gemspec b/ext/dbm/dbm.gemspec
index 0ff036f712..9f13f1c2a8 100644
--- a/ext/dbm/dbm.gemspec
+++ b/ext/dbm/dbm.gemspec
@@ -6,7 +6,7 @@ Gem::Specification.new do |s|
   s.description = "Provides a wrapper for the UNIX-style Database Manager Library"
 
   s.require_path = %w{lib}
-  s.files = %w{ext/dbm/extconf.rb ext/dbm/dbm.c}
+  s.files = %w{README.md LICENSE.txt ext/dbm/extconf.rb ext/dbm/dbm.c}
   s.extensions = %w{ext/dbm/extconf.rb}
   s.required_ruby_version = ">= 2.3.0"