diff --git a/Gemfile b/Gemfile
index 143a8105..0de8faf1 100644
--- a/Gemfile
+++ b/Gemfile
@@ -70,7 +70,7 @@ gem 'rack-attack', '~> 6.0'
 gem 'rack-cors', '~> 1.0', require: 'rack/cors'
 gem 'rails-i18n', '~> 5.1'
 gem 'rails-settings-cached', '~> 0.6'
-gem 'redis', '~> 4.1', require: ['redis', 'redis/connection/hiredis']
+gem 'redis', '~> 4.2', require: ['redis', 'redis/connection/hiredis']
 gem 'mario-redis-lock', '~> 1.2', require: 'redis_lock'
 gem 'rqrcode', '~> 0.10'
 gem 'sanitize', '~> 5.0'
diff --git a/Gemfile.lock b/Gemfile.lock
index 4aacc615..e8dff848 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -754,7 +754,7 @@ DEPENDENCIES
   rails-settings-cached (~> 0.6)
   rdf-normalize (~> 0.3)
   redcarpet (~> 3.4)
-  redis (~> 4.1)
+  redis (~> 4.2)
   redis-namespace (~> 1.5)
   redis-rails (~> 5.0)
   rqrcode (~> 0.10)
diff --git a/config/initializers/redis.rb b/config/initializers/redis.rb
index 0ae37b6a..ca1fd54f 100644
--- a/config/initializers/redis.rb
+++ b/config/initializers/redis.rb
@@ -3,7 +3,7 @@ require 'connection_pool'
 
 
 
-redis_connection = ConnectionPool::Wrapper.new(size: ENV['REDIS_POOL_SIZE'], timeout: 10) { Redis.new(
+redis_connection = ConnectionPool::Wrapper.new(size: ENV['REDIS_POOL_SIZE'] || 5, timeout: 10) { Redis.new(
   url: ENV['REDIS_URL'],
   driver: :hiredis
 )}