diff --git a/client/coral-ui/components/Dialog.css b/client/coral-ui/components/Dialog.css
index 9e7700299..7c260cbbf 100644
--- a/client/coral-ui/components/Dialog.css
+++ b/client/coral-ui/components/Dialog.css
@@ -1,3 +1,14 @@
 
 .dialog {
 }
+
+:global(.backdrop) {
+  z-index: 100148;
+  left: 0;
+  top: 0;
+  width: 100%;
+  height: 100%;
+  position: absolute;
+  background-color: black;
+  opacity: 0.1;
+}