diff --git a/diversipub.gemspec b/diversipub.gemspec
index e23d847..d69b962 100644
--- a/diversipub.gemspec
+++ b/diversipub.gemspec
@@ -48,6 +48,7 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency 'json',            '~> 2.6', '>= 2.6.3'
   spec.add_runtime_dependency 'logger',          '~> 1.5', '>= 1.5.3'
   spec.add_runtime_dependency 'pathname',        '~> 0.2.1'
+  spec.add_runtime_dependency 'pg',              '~> 1.5', '>= 1.5.3'
   spec.add_runtime_dependency 'puma',            '~> 6.2', '>= 6.2.2'
   spec.add_runtime_dependency 'rack',            '~> 2.2', '>= 2.2.7'
   spec.add_runtime_dependency 'rack-protection', '~> 3.0', '>= 3.0.6'
diff --git a/lib/diversipub.rb b/lib/diversipub.rb
index f6c0529..86e96e8 100644
--- a/lib/diversipub.rb
+++ b/lib/diversipub.rb
@@ -5,6 +5,7 @@ require 'erb'
 require 'json'
 require 'logger'
 require 'pathname'
+require 'pg'
 require 'puma'
 require 'rack'
 require 'rack/handler/puma'