diff --git a/Gemfile b/Gemfile
index ef66138d5..b4e6ae7d9 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 gem 'bootsnap', require: false
 gem 'puma'
 gem 'rails', github: 'rails/rails'
-gem 'redis', '~> 4.2'
+gem 'redis', '~> 4.3'
 gem 'sidekiq'
 
 # database
diff --git a/Gemfile.lock b/Gemfile.lock
index ae572dbf0..d1229fb1b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -297,7 +297,9 @@ GEM
     marcel (0.3.3)
       mimemagic (~> 0.3.2)
     method_source (1.0.0)
-    mimemagic (0.3.5)
+    mimemagic (0.3.10)
+      nokogiri (~> 1)
+      rake
     mini_magick (4.11.0)
     mini_mime (1.0.2)
     mini_portile2 (2.4.0)
@@ -377,7 +379,7 @@ GEM
       ffi (~> 1.0)
     recaptcha (5.6.0)
       json
-    redis (4.2.2)
+    redis (4.3.1)
     regexp_parser (1.8.2)
     rein (5.1.0)
       activerecord (>= 4.0.0)
@@ -554,7 +556,7 @@ DEPENDENCIES
   rack-mini-profiler
   rails!
   recaptcha
-  redis (~> 4.2)
+  redis (~> 4.3)
   rein (>= 5.1.0)
   rollbar
   rubocop