diff --git a/Gemfile b/Gemfile
index be366c49..831c5ffb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,7 +24,7 @@ gem 'pundit'
 gem 'pundit_extra'
 gem 'rack-attack'
 gem 'rack-cors'
-gem 'redis'
+gem 'redis', '~> 3.3.3'
 gem 'slack-notifier'
 gem 'snorlax'
 gem 'sucker_punch'
diff --git a/Gemfile.lock b/Gemfile.lock
index fe922d7b..c1b98be7 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -220,7 +220,7 @@ GEM
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    redis (4.0.0)
+    redis (3.3.3)
     responders (2.4.0)
       actionpack (>= 4.2.0, < 5.3)
       railties (>= 4.2.0, < 5.3)
@@ -331,7 +331,7 @@ DEPENDENCIES
   rack-attack
   rack-cors
   rails (~> 5.0.0)
-  redis
+  redis (~> 3.3.3)
   rspec-rails
   rubocop
   sass-rails
@@ -348,4 +348,4 @@ RUBY VERSION
    ruby 2.3.0p0
 
 BUNDLED WITH
-   1.14.6
+   1.15.4