diff --git a/web/documentserver-example/ruby/Gemfile b/web/documentserver-example/ruby/Gemfile
index 515c9851..b889f6bd 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
diff --git a/web/documentserver-example/ruby/licenses/3rd-Party.license b/web/documentserver-example/ruby/licenses/3rd-Party.license
index b22ffd8c..5af57161 100644
--- a/web/documentserver-example/ruby/licenses/3rd-Party.license
+++ b/web/documentserver-example/ruby/licenses/3rd-Party.license
@@ -70,8 +70,4 @@ License File:   uuid.license
 
 web-console   - A debugging tool for your Ruby on Rails applications. (https://github.com/rails/web-console/blob/master/MIT-LICENSE)
 License:        MIT
-License File:   web-console.license
-
-mimemagic     - А library to detect the mime type of a file by extension or by content. (https://github.com/mimemagicrb/mimemagic/blob/master/LICENSE)
-License:        MIT
-License File:   mimemagic.license
\ No newline at end of file
+License File:   web-console.license
\ No newline at end of file
diff --git a/web/documentserver-example/ruby/licenses/mimemagic.license b/web/documentserver-example/ruby/licenses/mimemagic.license
deleted file mode 100644
index 6bded2ab..00000000
--- a/web/documentserver-example/ruby/licenses/mimemagic.license
+++ /dev/null
@@ -1,19 +0,0 @@
-Copyright (c) 2011 Daniel Mendler
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-THE SOFTWARE.
\ No newline at end of file