diff --git a/Gemfile b/Gemfile
index fcdf536d9..5fc124457 100644
--- a/Gemfile
+++ b/Gemfile
@@ -21,6 +21,7 @@ gem 'jquery-rails', '>= 4.4.0'
 gem 'json-jwt', '>= 1.13.0'
 gem 'jwt'
 gem 'lograge'
+gem 'mimemagic', '0.3.5', git: 'https://github.com/mimemagicrb/mimemagic', ref: '40dd02bb6b442535f9'
 gem 'newrelic_rpm', '>= 6.14.0'
 gem 'nokogiri', '~> 1.11', '>= 1.11.0'
 gem 'omniauth-rails_csrf_protection', '~> 0.1', '>= 0.1.2'
diff --git a/Gemfile.lock b/Gemfile.lock
index be5e16b1a..f2f0cb667 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -46,6 +46,13 @@ GIT
       multi_json (~> 1.14)
       omniauth (~> 1.8.1)
 
+GIT
+  remote: https://github.com/mimemagicrb/mimemagic
+  revision: 40dd02bb6b442535f97c35326c0383bc67146ac4
+  ref: 40dd02bb6b442535f9
+  specs:
+    mimemagic (0.3.5)
+
 GEM
   remote: https://rubygems.org/
   specs:
@@ -301,7 +308,6 @@ GEM
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2020.1104)
-    mimemagic (0.3.6)
     mini_mime (1.0.2)
     mini_portile2 (2.5.0)
     minitest (5.14.4)
@@ -595,6 +601,7 @@ DEPENDENCIES
   jwt
   listen (~> 3.3)
   lograge
+  mimemagic (= 0.3.5)!
   newrelic_rpm (>= 6.14.0)
   nokogiri (~> 1.11, >= 1.11.0)
   omniauth-rails_csrf_protection (~> 0.1, >= 0.1.2)