diff --git a/app/assets/javascripts/select-kit/components/category-drop.js.es6 b/app/assets/javascripts/select-kit/components/category-drop.js.es6
index c589dc2091c..89a8d485f0d 100644
--- a/app/assets/javascripts/select-kit/components/category-drop.js.es6
+++ b/app/assets/javascripts/select-kit/components/category-drop.js.es6
@@ -18,6 +18,7 @@ export default ComboBoxComponent.extend({
   categoryStyle: Ember.computed.alias("siteSettings.category_style"),
   noCategoriesLabel: I18n.t("categories.no_subcategory"),
   mutateAttributes() {},
+  fullWidthOnMobile: true,
 
   init() {
     this._super();
diff --git a/app/assets/javascripts/select-kit/components/tag-drop.js.es6 b/app/assets/javascripts/select-kit/components/tag-drop.js.es6
index 8919679f757..1ebcd1e9bae 100644
--- a/app/assets/javascripts/select-kit/components/tag-drop.js.es6
+++ b/app/assets/javascripts/select-kit/components/tag-drop.js.es6
@@ -19,6 +19,7 @@ export default ComboBoxComponent.extend({
   tagId: null,
   categoryStyle: Ember.computed.alias("siteSettings.category_style"),
   mutateAttributes() {},
+  fullWidthOnMobile: true,
 
   @computed("tagId")
   noTagsSelected() {