diff --git a/arduino-ide-extension/src/browser/style/index.css b/arduino-ide-extension/src/browser/style/index.css
index 45a46c470..e4fe0cf7d 100644
--- a/arduino-ide-extension/src/browser/style/index.css
+++ b/arduino-ide-extension/src/browser/style/index.css
@@ -125,4 +125,4 @@ button.theia-button.main {
   background-attachment: fixed;
   background-position: center;
   transition: opacity 0.8s;
-}
\ No newline at end of file
+}
diff --git a/arduino-ide-extension/src/browser/style/sketchbook.css b/arduino-ide-extension/src/browser/style/sketchbook.css
index 2c88daa3f..64617d48d 100644
--- a/arduino-ide-extension/src/browser/style/sketchbook.css
+++ b/arduino-ide-extension/src/browser/style/sketchbook.css
@@ -49,6 +49,10 @@
 
 }
 
+#arduino-sketchbook-tree-widget .theia-TreeNode {
+  line-height: 30px;
+}
+
 #arduino-sketchbook-tree-widget .theia-TreeNodeSegmentGrow {
   flex: 1;
 }