diff --git a/web/documentserver-example/ruby/Gemfile b/web/documentserver-example/ruby/Gemfile
index f8432dd4..f80b258a 100644
--- a/web/documentserver-example/ruby/Gemfile
+++ b/web/documentserver-example/ruby/Gemfile
@@ -1,6 +1,5 @@
 source 'https://rubygems.org'
 
-gem 'mimemagic', github: 'mimemagicrb/mimemagic', ref: '01f92d86d15d85cfd0f20dabd025dcbd36a8a60f' 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '6.0.3.5'
 # Use sqlite3 as the database for Active Record