diff --git a/Gemfile b/Gemfile
index b172d96..a4fec62 100644
--- a/Gemfile
+++ b/Gemfile
@@ -38,7 +38,7 @@ gem 'rack-cors'
 
 # Reduces boot times through caching; required in config/boot.rb
 gem 'bootsnap', '>= 1.1.0', require: false
-gem 'sidekiq', '~>6.0.0'
+gem 'sidekiq', '~>6.4.0'
 gem 'pg', '~>1.1.3'
 
 group :development, :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index 20f948c..099227d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -73,7 +73,7 @@ GEM
       execjs
     coffee-script-source (1.12.2)
     concurrent-ruby (1.1.5)
-    connection_pool (2.2.2)
+    connection_pool (2.2.5)
     crass (1.0.5)
     erubi (1.9.0)
     execjs (2.7.0)
@@ -110,11 +110,9 @@ GEM
     pg (1.1.4)
     public_suffix (4.0.1)
     puma (3.12.2)
-    rack (2.0.8)
+    rack (2.2.3)
     rack-cors (1.1.1)
       rack (>= 2.0.0)
-    rack-protection (2.0.7)
-      rack
     rack-proxy (0.6.5)
       rack
     rack-test (1.1.0)
@@ -147,7 +145,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)
-    redis (4.1.3)
+    redis (4.5.1)
     regexp_parser (1.6.0)
     ruby_dep (1.5.0)
     rubyzip (1.3.0)
@@ -165,11 +163,10 @@ GEM
     selenium-webdriver (3.142.4)
       childprocess (>= 0.5, < 3.0)
       rubyzip (~> 1.2, >= 1.2.2)
-    sidekiq (6.0.3)
+    sidekiq (6.4.0)
       connection_pool (>= 2.2.2)
-      rack (>= 2.0.0)
-      rack-protection (>= 2.0.0)
-      redis (>= 4.1.0)
+      rack (~> 2.0)
+      redis (>= 4.2.0)
     spring (2.1.0)
     sprockets (3.7.2)
       concurrent-ruby (~> 1.0)
@@ -221,7 +218,7 @@ DEPENDENCIES
   rails (~> 5.2.3)
   sass-rails (~> 5.0)
   selenium-webdriver
-  sidekiq (~> 6.0.0)
+  sidekiq (~> 6.4.0)
   spring
   turbolinks (~> 5)
   tzinfo-data