diff --git a/assets/css/src/newsletter_editor/contentBlocks/posts.styl b/assets/css/src/newsletter_editor/contentBlocks/posts.styl
index 6040e7a9de..5137e52bca 100644
--- a/assets/css/src/newsletter_editor/contentBlocks/posts.styl
+++ b/assets/css/src/newsletter_editor/contentBlocks/posts.styl
@@ -18,6 +18,7 @@
 .mailpoet_settings_posts_display_options
 .mailpoet_settings_posts_selection
   animation-slide-open-downwards()
+  overflow-x: hidden
 
 .mailpoet_settings_posts_show_display_options,
 .mailpoet_settings_posts_show_post_selection