diff --git a/config_default.php b/config_default.php
index 13dda8c..59f877a 100644
--- a/config_default.php
+++ b/config_default.php
@@ -59,7 +59,7 @@
     /*
      * Height of thumbnail image for OPDS
      */
-    $config['cops_opds_thumbnail_height'] = "140";
+    $config['cops_opds_thumbnail_height'] = "164";
     
     /*
      * Height of thumbnail image for HTML