diff --git a/Gemfile.lock b/Gemfile.lock
index 50cbde23..9bbe9a22 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -649,8 +649,8 @@ GEM
     colorize (0.8.1)
     columnize (0.8.9)
     commonjs (0.2.7)
-    concurrent-ruby (1.0.5)
-    connection_pool (2.2.1)
+    concurrent-ruby (1.1.9)
+    connection_pool (2.2.5)
     crack (0.3.2)
     crass (1.0.3)
     database_cleaner (1.3.0)
@@ -796,7 +796,9 @@ GEM
       railties (>= 3.0.0, < 5.0.0)
     method_source (0.8.2)
     mime-types (2.99.3)
-    mimemagic (0.3.2)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
@@ -847,12 +849,12 @@ GEM
       slop (~> 3.4)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
-    rack (1.6.10)
+    rack (1.6.13)
     rack-contrib (1.1.0)
       rack (>= 0.9.1)
     rack-mini-profiler (0.10.7)
       rack (>= 1.2.0)
-    rack-protection (1.5.3)
+    rack-protection (1.5.5)
       rack
     rack-test (0.6.3)
       rack (>= 1.0)
@@ -953,11 +955,11 @@ GEM
     shoulda-context (1.2.1)
     shoulda-matchers (2.6.2)
       activesupport (>= 3.0.0)
-    sidekiq (4.2.10)
-      concurrent-ruby (~> 1.0)
-      connection_pool (~> 2.2, >= 2.2.0)
+    sidekiq (5.2.8)
+      connection_pool (~> 2.2, >= 2.2.2)
+      rack (< 2.1.0)
       rack-protection (>= 1.5.0)
-      redis (~> 3.2, >= 3.2.1)
+      redis (>= 3.3.5, < 5)
     sidekiq-limit_fetch (3.4.0)
       sidekiq (>= 4)
     sidekiq-scheduler (2.1.7)