diff --git a/scss/modules/_hacks.scss b/scss/modules/_hacks.scss
index 61660375..395f7aef 100644
--- a/scss/modules/_hacks.scss
+++ b/scss/modules/_hacks.scss
@@ -2,6 +2,10 @@
   margin-left: 1px; // This is necessary because this container is being undersized on the width property by a script. Without this, there would be a 1px space on the right, to the left of the monkey scroller.
 }
 
+.monkey_scroll_bar {
+  z-index: 99; // This should have a higher z-index than messages and dividers or else they overlap.
+}
+
 .client_header_icon {
   -moz-filter: brightness(0.6) contrast(3) invert(1) sepia(0.5);
   -webkit-filter: brightness(0.6) contrast(3) invert(1) sepia(0.5);