diff --git a/Gemfile b/Gemfile
index 0395dcb5..38bbe57a 100644
--- a/Gemfile
+++ b/Gemfile
@@ -4,7 +4,7 @@ gem 'aws-sdk-ses', '~> 1.38'
 gem 'bootsnap', require: false
 gem 'figaro', '~> 1.2.0'
 gem 'jbuilder'
-gem 'mimemagic', '~> 0.3.10'
+gem 'mimemagic', '~> 0.4.3'
 gem 'pg', '~> 1.2.3'
 gem 'rails', '>= 6.0.3.1'
 gem 'recaptcha', '~> 5.8', require: 'recaptcha/rails'
diff --git a/Gemfile.lock b/Gemfile.lock
index e92bd56f..e77f4a1c 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -120,7 +120,7 @@ GEM
       mini_mime (>= 0.1.1)
     marcel (1.0.1)
     method_source (1.0.0)
-    mimemagic (0.3.10)
+    mimemagic (0.4.3)
       nokogiri (~> 1)
       rake
     mina (1.2.3)
@@ -248,7 +248,7 @@ DEPENDENCIES
   figaro (~> 1.2.0)
   jbuilder
   listen (>= 3.0.5, < 3.6)
-  mimemagic (~> 0.3.10)
+  mimemagic (~> 0.4.3)
   mina (~> 1.2.3)
   passenger (>= 5.3.2)
   pg (~> 1.2.3)