diff --git a/css/ngDialog-theme-default.css b/css/ngDialog-theme-default.css
index b3b90ec6..acf64003 100644
--- a/css/ngDialog-theme-default.css
+++ b/css/ngDialog-theme-default.css
@@ -78,6 +78,7 @@
   padding: 1em;
   position: relative;
   width: 450px;
+  z-index: 1  
 }
 
 .ngdialog.ngdialog-theme-default .ngdialog-close {
@@ -185,4 +186,4 @@
 .ngdialog.ngdialog-theme-default .ngdialog-button.ngdialog-button-secondary {
   background: #e0e0e0;
   color: #777;
-}
\ No newline at end of file
+}