diff --git a/app/assets/stylesheets/stream_element.css.scss b/app/assets/stylesheets/stream_element.css.scss
index b7cfe0708..249bab9db 100644
--- a/app/assets/stylesheets/stream_element.css.scss
+++ b/app/assets/stylesheets/stream_element.css.scss
@@ -7,6 +7,11 @@
   .stream_element {
     border-bottom: 1px solid $border-grey;
 
+    h1, h2, h3, h4, h5, h6 {
+      word-wrap: break-word;
+      word-break: break-word;
+    }
+
     p {
       &:last-child {
         padding-bottom: 0;