diff --git a/packages/monaco/src/browser/style/index.css b/packages/monaco/src/browser/style/index.css
index 03c2e9840d8f5..e9b469097b83d 100644
--- a/packages/monaco/src/browser/style/index.css
+++ b/packages/monaco/src/browser/style/index.css
@@ -105,6 +105,7 @@
   margin-left: -300px !important;
   background-color: var(--theia-quickInput-background) !important;
   color: var(--theia-foreground) !important;
+  box-shadow: rgb(0 0 0 / 36%) 0px 0px 8px 2px;
 }
 
 .monaco-icon-label,