diff --git a/Gemfile.lock b/Gemfile.lock
index 1b854b57..091dd297 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -84,7 +84,7 @@ 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)
     date_validator (0.9.0)
       activemodel
@@ -147,7 +147,9 @@ GEM
       thread_safe (~> 0.3, >= 0.3.1)
     metaclass (0.0.4)
     method_source (0.9.2)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.1)
     mini_portile2 (2.4.0)
     minitest (5.11.3)
@@ -186,9 +188,7 @@ GEM
       method_source (~> 0.9.0)
     public_suffix (3.0.3)
     puma (3.12.2)
-    rack (2.0.8)
-    rack-protection (2.0.4)
-      rack
+    rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
     rails (5.2.3)
@@ -223,7 +223,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    redis (4.0.3)
+    redis (4.5.1)
     rubyzip (1.3.0)
     sass (3.6.0)
       sass-listen (~> 4.0.0)
@@ -236,10 +236,10 @@ GEM
       sprockets (>= 2.8, < 4.0)
       sprockets-rails (>= 2.0, < 4.0)
       tilt (>= 1.1, < 3)
-    sidekiq (5.2.2)
-      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)
     simple_oauth (0.3.1)
     simplecov (0.16.1)
       docile (~> 1.1)