diff --git a/Gemfile.lock b/Gemfile.lock
index 3523c78..66ad0ab 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -166,7 +166,7 @@ GEM
     chunky_png (1.3.11)
     coderay (1.1.2)
     concurrent-ruby (1.1.9)
-    connection_pool (2.2.2)
+    connection_pool (2.2.5)
     crack (0.4.3)
       safe_yaml (~> 1.0.0)
     crass (1.0.6)
@@ -298,8 +298,6 @@ GEM
     rack-pjax (1.1.0)
       nokogiri (~> 1.5)
       rack (>= 1.1)
-    rack-protection (2.0.4)
-      rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.4.1)
@@ -342,7 +340,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    redis (4.0.3)
+    redis (4.6.0)
     regexp_parser (1.7.0)
     remotipart (1.4.4)
     request_store (1.5.0)
@@ -390,10 +388,10 @@ GEM
       sprockets (> 3.0)
       sprockets-rails
       tilt
-    sidekiq (5.2.3)
-      connection_pool (~> 2.2, >= 2.2.2)
-      rack-protection (>= 1.5.0)
-      redis (>= 3.3.5, < 5)
+    sidekiq (6.4.0)
+      connection_pool (>= 2.2.2)
+      rack (~> 2.0)
+      redis (>= 4.2.0)
     sidekiq-scheduler (3.0.0)
       redis (>= 3, < 5)
       rufus-scheduler (~> 3.2)