diff --git a/Gemfile.lock b/Gemfile.lock
index 5afdcd5..638c2e2 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -84,7 +84,7 @@ GEM
       activesupport
     coderay (1.1.2)
     concurrent-ruby (1.0.5)
-    connection_pool (2.2.2)
+    connection_pool (2.2.5)
     crass (1.0.4)
     devise (4.4.3)
       bcrypt (~> 3.0)
@@ -125,7 +125,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (0.9.0)
-    mimemagic (0.3.3)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_mime (1.0.0)
     mini_portile2 (2.3.0)
     minitest (5.11.3)
@@ -142,7 +144,7 @@ GEM
       byebug (~> 10.0)
       pry (~> 0.10)
     public_suffix (3.0.2)
-    rack (2.0.5)
+    rack (2.2.3)
     rack-protection (2.0.2)
       rack
     rack-test (1.0.0)
@@ -176,7 +178,7 @@ GEM
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rake (12.3.1)
-    redis (4.1.2)
+    redis (4.5.1)
     request_store (1.4.1)
       rack (>= 1.4)
     responders (2.4.0)
@@ -199,11 +201,10 @@ GEM
       rspec-mocks (~> 3.7.0)
       rspec-support (~> 3.7.0)
     rspec-support (3.7.1)
-    sidekiq (5.2.7)
-      connection_pool (~> 2.2, >= 2.2.2)
-      rack (>= 1.5.0)
-      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)
     sinatra (2.0.2)
       mustermann (~> 1.0)
       rack (~> 2.0)