diff --git a/app/models/dmsf_file.rb b/app/models/dmsf_file.rb
index 56514f20..a51bfeb5 100644
--- a/app/models/dmsf_file.rb
+++ b/app/models/dmsf_file.rb
@@ -110,6 +110,14 @@ class DmsfFile < ActiveRecord::Base
     visible.find_by project_id: project_id, dmsf_folder_id: folder&.id, name: name
   end
 
+  def approval_allowed_zero_minor
+    if Setting.plugin_redmine_dmsf['only_approval_zero_minor_version'] 
+      return last_revision.minor_version == 0
+    else
+      return true
+    end
+  end
+
   def last_revision
     unless defined?(@last_revision)
       @last_revision = deleted? ? dmsf_file_revisions.first : dmsf_file_revisions.visible.first
diff --git a/app/views/dmsf_context_menus/_approval_workflow.html.erb b/app/views/dmsf_context_menus/_approval_workflow.html.erb
index 25fb44ea..bc41e47c 100644
--- a/app/views/dmsf_context_menus/_approval_workflow.html.erb
+++ b/app/views/dmsf_context_menus/_approval_workflow.html.erb
@@ -24,6 +24,7 @@
 <% wf = DmsfWorkflow.find_by(id: dmsf_file.last_revision.dmsf_workflow_id) if dmsf_file.last_revision.dmsf_workflow_id %>
 <% file_approval_allowed = User.current.allowed_to?(:file_approval, project) %>
 <% allowed = User.current && (dmsf_file.last_revision.dmsf_workflow_assigned_by_user == User.current) && wf %>
+<% allowed_minor = dmsf_file.approval_allowed_zero_minor %>
 
 <% if file_approval_allowed %>
   <% case dmsf_file.last_revision.workflow %>
@@ -32,22 +33,43 @@
           <% assignments = wf.next_assignments(dmsf_file.last_revision.id) %>
           <% index = assignments.find_index{ |assignment| assignment.user_id == User.current.id } if assignments %>
           <% assignment_id = (index && assignments && assignments[index]) ? assignments[index].id : nil %>
-          <%= context_menu_link l(:title_approval), action_dmsf_workflow_path(project_id: project.id, id: wf.id,
+          <% if allowed_minor %>
+            <%= context_menu_link l(:title_approval), action_dmsf_workflow_path(project_id: project.id, id: wf.id,
                                 dmsf_workflow_step_assignment_id: assignment_id,
                                 dmsf_file_revision_id: dmsf_file.last_revision.id),
                                 remote: true, class: 'icon icon-ok', id: 'dmsf-cm-workflow',
                                 disabled: !assignments || !index %>
+          <% else %>
+            <%= context_menu_link l(:title_approval_minor), action_dmsf_workflow_path(project_id: project.id, id: wf.id,
+                                dmsf_workflow_step_assignment_id: assignment_id,
+                                dmsf_file_revision_id: dmsf_file.last_revision.id),
+                                remote: true, class: 'icon icon-ok', id: 'dmsf-cm-workflow',
+                                disabled: true %>
+          <% end %>
       <% end %>
     <% when DmsfWorkflow::STATE_ASSIGNED %>
-      <%= context_menu_link l(:title_start), start_dmsf_workflow_path(id: dmsf_file.last_revision.dmsf_workflow_id,
+      <% if allowed_minor %>
+        <%= context_menu_link l(:title_start), start_dmsf_workflow_path(id: dmsf_file.last_revision.dmsf_workflow_id,
                             dmsf_file_revision_id: dmsf_file.last_revision.id),
                             class: 'icon icon-ok', disabled: !allowed %>
+      <% else %>
+        <%= context_menu_link l(:title_start_minor), start_dmsf_workflow_path(id: dmsf_file.last_revision.dmsf_workflow_id,
+                            dmsf_file_revision_id: dmsf_file.last_revision.id),
+                            class: 'icon icon-ok', disabled: true %>
+      <% end %>
     <% when DmsfWorkflow::STATE_APPROVED, DmsfWorkflow::STATE_REJECTED, DmsfWorkflow::STATE_OBSOLETE %>
         <%# %>
     <% else %>
-        <%= context_menu_link l(:title_assignment), assign_dmsf_workflow_path(id: project.id, project_id: project.id,
+        <% if allowed_minor %>
+            <%= context_menu_link l(:title_assignment), assign_dmsf_workflow_path(id: project.id, project_id: project.id,
                               dmsf_file_revision_id: dmsf_file.last_revision.id),
                               remote: true, class: 'icon icon-ok', id: 'dmsf-cm-workflow',
                               disabled: locked || !workflows_available %>
+        <% else %>
+            <%= context_menu_link l(:title_assignment_minor), assign_dmsf_workflow_path(id: project.id, project_id: project.id,
+                              dmsf_file_revision_id: dmsf_file.last_revision.id),
+                              remote: true, class: 'icon icon-ok', id: 'dmsf-cm-workflow',
+                              disabled: true %>
+        <% end %>
     <% end %>
 <% end %>
diff --git a/app/views/settings/_dmsf_settings.html.erb b/app/views/settings/_dmsf_settings.html.erb
index 5f12c4db..5015ab9e 100644
--- a/app/views/settings/_dmsf_settings.html.erb
+++ b/app/views/settings/_dmsf_settings.html.erb
@@ -209,6 +209,14 @@
   </em>
 </p>
 
+<p>
+  <%= content_tag(:label, l(:only_approval_zero_minor_version)) %>
+  <%= check_box_tag 'settings[only_approval_zero_minor_version]', false, @settings['only_approval_zero_minor_version'], size: 50 %>
+  <em class="info">
+    <%= l(:only_approval_zero_minor_version) %><br/> <%= l(:label_default) %>: <%= l(:general_text_No)%>
+  </em>
+</p>
+
 <hr/>
 <em class="info">
   <%= l(:label_webdav) %>
@@ -331,3 +339,5 @@
     <%= l(:text_enable_cjk_ngrams) %>
   </em>
 </p>
+
+
diff --git a/config/locales/en.yml b/config/locales/en.yml
index 83b167f0..9b58a00c 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -255,10 +255,13 @@ en:
   title_rejection: Rejection
   title_delegation: Delegation
   title_assignment: Assignment
+  title_assignment_minor: Assignment not allowed, minor must be zero 
   title_start: Start
+  title_start_minor: Start not allowed, minor must be zero
   title_dmsf_workflow_log: Approval Workflow Log
   title_assigned: Assigned
   title_approval: Approval
+  title_approval_minor: Approval not allowed, minor must be zero
   title_rejected: Rejected
   title_obsolete: Obsolete
   dmsf_and: AND
@@ -431,4 +434,5 @@ en:
   activerecord:
     errors:
       messages:
-        error_contains_invalid_character: contains invalid character(s)
\ No newline at end of file
+        error_contains_invalid_character: contains invalid character(s)
+  only_approval_zero_minor_version: only approval zero minor version