diff --git a/Gemfile b/Gemfile
index ebd8d8c..943638b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -24,7 +24,7 @@ gem 'cancancan', '~> 1.10'
 gem 'carrierwave', '~> 1'
 gem 'omniauth'
 gem 'omniauth-github'
-gem 'sidekiq', '~> 5'
+gem 'sidekiq', '~> 6'
 gem 'redcarpet'
 gem 'rouge', '~> 2.0.6'
 gem 'acts-as-taggable-on'
diff --git a/Gemfile.lock b/Gemfile.lock
index 58e2114..bfba693 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -245,8 +245,6 @@ GEM
     public_suffix (3.0.1)
     puma (3.11.0)
     rack (2.2.8)
-    rack-protection (3.0.6)
-      rack
     rack-test (0.6.3)
       rack (>= 1.0)
     rails (5.0.7.2)
@@ -284,7 +282,7 @@ GEM
       ffi (~> 1.0)
     rdoc (4.3.0)
     redcarpet (3.4.0)
-    redis (4.5.1)
+    redis (4.8.1)
     redis-namespace (1.6.0)
       redis (>= 3.0.4)
     responders (2.4.1)
@@ -339,11 +337,10 @@ GEM
     shoulda-context (1.2.2)
     shoulda-matchers (2.8.0)
       activesupport (>= 3.0.0)
-    sidekiq (5.2.10)
-      connection_pool (~> 2.2, >= 2.2.2)
+    sidekiq (6.5.10)
+      connection_pool (>= 2.2.5, < 3)
       rack (~> 2.0)
-      rack-protection (>= 1.5.0)
-      redis (~> 4.5, < 4.6.0)
+      redis (>= 4.5.0, < 5)
     simple_form (3.5.0)
       actionpack (> 4, < 5.2)
       activemodel (> 4, < 5.2)
@@ -456,7 +453,7 @@ DEPENDENCIES
   sdoc (~> 0.4.0)
   settingslogic
   shoulda
-  sidekiq (~> 5)
+  sidekiq (~> 6)
   simple_form
   simplecov
   slack-notifier