diff --git a/arduino-ide-extension/src/browser/style/main.css b/arduino-ide-extension/src/browser/style/main.css
index 40cae2a31..ede6c726c 100644
--- a/arduino-ide-extension/src/browser/style/main.css
+++ b/arduino-ide-extension/src/browser/style/main.css
@@ -2,6 +2,16 @@
     background: var(--theia-editorGroupHeader-tabsBackground);
 }
 
+/* Avoid the Intellisense widget may be cover by the bottom panel partially.
+   TODO: This issue may be resolved after monaco-editor upgrade */
+#theia-main-content-panel {
+    z-index: auto
+}
+
+#theia-main-content-panel div[id^="code-editor-opener"] {
+    z-index: auto;
+}
+    
 .p-TabBar-toolbar .item.arduino-tool-item {
     margin-left: 0;
 }