diff --git a/plugins/libkolab/lib/kolab_storage_cache_contact.php b/plugins/libkolab/lib/kolab_storage_cache_contact.php
index d526a0e7..70aa5f62 100644
--- a/plugins/libkolab/lib/kolab_storage_cache_contact.php
+++ b/plugins/libkolab/lib/kolab_storage_cache_contact.php
@@ -23,8 +23,9 @@
 
 class kolab_storage_cache_contact extends kolab_storage_cache
 {
-    protected $extra_cols = array('type','name','firstname','surname','email');
-    protected $binary_items = array(
+    protected $extra_cols_max = 255;
+    protected $extra_cols     = array('type','name','firstname','surname','email');
+    protected $binary_items   = array(
         'photo'          => '|<photo><uri>[^;]+;base64,([^<]+)</uri></photo>|i',
         'pgppublickey'   => '|<key><uri>data:application/pgp-keys;base64,([^<]+)</uri></key>|i',
         'pkcs7publickey' => '|<key><uri>data:application/pkcs7-mime;base64,([^<]+)</uri></key>|i',
@@ -59,6 +60,13 @@ class kolab_storage_cache_contact extends kolab_storage_cache
             $sql_data['name'] = rcube_charset::clean($object['organization']);
         }
 
+        // make sure some data is not longer that database limit (#5291)
+        foreach ($this->extra_cols as $col) {
+            if (strlen($sql_data[$col]) > $this->extra_cols_max) {
+                $sql_data[$col] = rcube_charset::clean(substr($sql_data[$col], 0,  $this->extra_cols_max));
+            }
+        }
+
         return $sql_data;
     }
 }
\ No newline at end of file