diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 53b95868..f2fc799e 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -14,6 +14,8 @@ Changelog
 - Support private comments with issue macro
 - Google Docs macro has been added
 - Fix bug with Rack 2.0.8 or newer
+- Drop Redmine 3.4 support
+- Add Redmine 4.1 support
 
 2.0.22
 ++++++
diff --git a/app/views/additionals/_settings_list_defaults.html.slim b/app/views/additionals/_settings_list_defaults.html.slim
index f618ced8..b21b5c9f 100644
--- a/app/views/additionals/_settings_list_defaults.html.slim
+++ b/app/views/additionals/_settings_list_defaults.html.slim
@@ -2,12 +2,8 @@ fieldset.box
   legend = l(:additionals_query_list_defaults)
   - setting_name_columns = "#{query_type}_list_defaults"
   - query = query_class.new(@settings[setting_name_columns.to_sym])
-  - if Redmine::VERSION.to_s >= '4'
-    .default-query-settings-label-redmine4
-      = render_query_columns_selection(query, name: "settings[#{setting_name_columns}][column_names]")
-  - else
-    .default-query-settings-label
-      = render_query_columns_selection(query, name: "settings[#{setting_name_columns}][column_names]")
+  .default-query-settings-label
+    = render_query_columns_selection(query, name: "settings[#{setting_name_columns}][column_names]")
 
 - columns = query_class.new.available_totalable_columns
 - if columns.count.positive?
diff --git a/assets/stylesheets/additionals.css b/assets/stylesheets/additionals.css
index d6e46ea9..fc7b2d5f 100644
--- a/assets/stylesheets/additionals.css
+++ b/assets/stylesheets/additionals.css
@@ -157,13 +157,8 @@
 
 div.clear-both { clear: both; }
 
-/* for Redmine 3.4 - fix problem with tabs */
+/* fix problem with tabs */
 .default-query-settings-label label {
-  margin-left: -100px !important;
-}
-
-/* for Redmine 4.x - fix problem with tabs */
-.default-query-settings-label-redmine4 label {
   width: 250px !important;
   margin-left: 0 !important;
   float: none;
diff --git a/docs/index.rst b/docs/index.rst
index 9d70f94b..de07e27b 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -38,9 +38,9 @@ Requirements
 ------------
 
 +--------------------+----------------------+
-| `Redmine`_ version | >= 3.4.0             |
+| `Redmine`_ version | >= 4.0.0             |
 +--------------------+----------------------+
-| `Ruby`_ version    | >= 2.3.0             |
+| `Ruby`_ version    | >= 2.4.0 (2.3.x should work, but untested) |
 +--------------------+----------------------+
 | Gem packages       | see `Gemfile`_       |
 +--------------------+----------------------+
diff --git a/init.rb b/init.rb
index 96f30098..ace3b7e5 100644
--- a/init.rb
+++ b/init.rb
@@ -33,7 +33,7 @@ Redmine::Plugin.register :additionals do
   end
 
   # required redmine version
-  requires_redmine version_or_higher: '3.4.0'
+  requires_redmine version_or_higher: '4.0.0'
 
   menu :admin_menu, :additionals, { controller: 'settings', action: 'plugin', id: 'additionals' }, caption: :label_additionals