diff --git a/app/views/my_module_tags/_index_edit.html.erb b/app/views/my_module_tags/_index_edit.html.erb
index 0b485a09d..f3d5d7ba8 100644
--- a/app/views/my_module_tags/_index_edit.html.erb
+++ b/app/views/my_module_tags/_index_edit.html.erb
@@ -63,7 +63,7 @@
     <%= bootstrap_form_for [@my_module, @new_mmt], remote: true, format: :json, html: { class: 'add-tag-form' } do |f| %>
       <div class="col-xs-6">
         <div class="well well-sm">
-          <%= collection_select(:my_module_tag, :tag_id, @unassigned_tags, :id, :name, {}, { class: 'selectpicker' }) %>
+          <%= collection_select(:my_module_tag, :tag_id, @unassigned_tags.collect{ |t| t.name = t.name.truncate(DROPDOWN_TEXT_MAX_LENGTH, omission: '...'); t }, :id, :name, {}, { class: 'selectpicker' }) %>
           <%= f.button class: 'btn btn-primary' do %>
             <span class="glyphicon glyphicon-plus"></span>
             <span class="hidden-xs"><%= t("experiments.canvas.modal_manage_tags.create") %></span>
diff --git a/app/views/my_modules/modals/_manage_module_tags_modal.html.erb b/app/views/my_modules/modals/_manage_module_tags_modal.html.erb
index 23e34bfda..94f977386 100644
--- a/app/views/my_modules/modals/_manage_module_tags_modal.html.erb
+++ b/app/views/my_modules/modals/_manage_module_tags_modal.html.erb
@@ -11,4 +11,4 @@
       </div>
     </div>
   </div>
-</div>
\ No newline at end of file
+</div>
diff --git a/config/initializers/constants.rb b/config/initializers/constants.rb
index 104c1264d..12aa8611a 100644
--- a/config/initializers/constants.rb
+++ b/config/initializers/constants.rb
@@ -38,6 +38,8 @@ TABLE_JSON_MAX_SIZE = 20
 FILE_MAX_SIZE = 50
 # Max uploaded user avatar size in MB
 AVATAR_MAX_SIZE = 0.2
+# Max characters for text in dropdown list
+DROPDOWN_TEXT_MAX_LENGTH = 15
 
 SEARCH_LIMIT = 20