diff --git a/README.md b/README.md
index bbf579b2..6c5e445e 100644
--- a/README.md
+++ b/README.md
@@ -43,7 +43,7 @@ Features
 Dependencies
 ------------
   
-  * Redmine 3.3.0 or higher
+  * Redmine 3.4.0 or higher
 
 ### Full-text search (optional)
 
diff --git a/init.rb b/init.rb
index bdd97f74..3fb93f93 100644
--- a/init.rb
+++ b/init.rb
@@ -34,7 +34,7 @@ Redmine::Plugin.register :redmine_dmsf do
   description 'Document Management System Features'
   version '1.6.0'
 
-  requires_redmine :version_or_higher => '3.3.0'
+  requires_redmine :version_or_higher => '3.4.0'
 
   settings  :partial => 'settings/dmsf_settings',
             :default => {