diff --git a/Gemfile b/Gemfile
index 21687522..24cc5821 100644
--- a/Gemfile
+++ b/Gemfile
@@ -41,7 +41,7 @@ gem 'webmock'
 gem 'zip_tricks'
 
 group :production do
-  gem 'connection_pool', '< 3'
+  gem 'connection_pool', '< 4'
   gem 'pg'
 end
 
diff --git a/Gemfile.lock b/Gemfile.lock
index aab0c451..c8cbc366 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -151,7 +151,7 @@ GEM
     climate_control (1.2.0)
     cocoon (1.2.15)
     concurrent-ruby (1.3.6)
-    connection_pool (2.5.5)
+    connection_pool (3.0.2)
     crack (1.0.1)
       bigdecimal
       rexml
@@ -485,7 +485,7 @@ DEPENDENCIES
   capybara
   climate_control
   cocoon
-  connection_pool (< 3)
+  connection_pool (< 4)
   csv
   delayed_job_active_record
   devise