diff --git a/Gemfile b/Gemfile
index 234e737..20517c3 100644
--- a/Gemfile
+++ b/Gemfile
@@ -22,7 +22,7 @@ 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 'psych', '< 4'
diff --git a/Gemfile.lock b/Gemfile.lock
index abc2a25..7fe53fc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -257,7 +257,7 @@ GEM
     orm_adapter (0.5.0)
     pagy (3.11.0)
     pdf-core (0.9.0)
-    pg (1.3.0)
+    pg (1.4.6)
     postmark (1.22.0)
       json
     postmark-rails (0.22.0)
@@ -511,7 +511,7 @@ DEPENDENCIES
   octokit (~> 4.20)
   ogp
   pagy (~> 3.5)
-  pg (~> 1.1)
+  pg (~> 1.4)
   postmark-rails
   prawn
   pry-byebug