diff --git a/Gemfile b/Gemfile
index 77b49e9..9e1f015 100644
--- a/Gemfile
+++ b/Gemfile
@@ -23,7 +23,7 @@ gem 'nokogiri', '>= 1.11.4'
 gem 'octokit', '~> 4.20'
 gem 'ogp'
 gem 'pagy', '~> 3.5'
-gem 'pg', '~> 1.1'
+gem 'pg', '~> 1.4'
 gem 'postmark-rails'
 gem 'prawn'
 gem 'puma', '>= 5.3.1'
diff --git a/Gemfile.lock b/Gemfile.lock
index 74aa6ec..69487d7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -259,7 +259,7 @@ GEM
     orm_adapter (0.5.0)
     pagy (3.11.0)
     pdf-core (0.9.0)
-    pg (1.3.0)
+    pg (1.4.2)
     postmark (1.22.0)
       json
     postmark-rails (0.22.0)
@@ -513,7 +513,7 @@ DEPENDENCIES
   octokit (~> 4.20)
   ogp
   pagy (~> 3.5)
-  pg (~> 1.1)
+  pg (~> 1.4)
   postmark-rails
   prawn
   pry-byebug