diff --git a/src/main/java/org/gcube/portlets/user/geoportaldataviewer/client/ui/gallery/ImagesGallery.java b/src/main/java/org/gcube/portlets/user/geoportaldataviewer/client/ui/gallery/ImagesGallery.java
index fd14c8a..d3effb0 100644
--- a/src/main/java/org/gcube/portlets/user/geoportaldataviewer/client/ui/gallery/ImagesGallery.java
+++ b/src/main/java/org/gcube/portlets/user/geoportaldataviewer/client/ui/gallery/ImagesGallery.java
@@ -80,11 +80,11 @@ public class ImagesGallery {
 											// GALLERY THEME
 											galleryTheme : {
 												thumbnail : {
-													borderRadius : '2px',
-													background : '#fff',
-													titleShadow : 'none',
-													titleColor : '#696969',
-													labelBackground : '#f3f3f3'
+													borderRadius : '2px !important',
+													background : '#ffffff !important',
+													titleShadow : 'none !important',
+													titleColor : '#696969 !important',
+													labelBackground : '#f3f3f3 !important'
 												},
 												thumbnailIcon : {
 													color : '#000',