diff --git uc_cart/uc_cart.install uc_cart/uc_cart.install
index 197b8c0..1ff8adc 100644
--- uc_cart/uc_cart.install
+++ uc_cart/uc_cart.install
@@ -34,7 +34,6 @@ function uc_cart_schema() {
       ),
       'qty' => array(
         'type' => 'int',
-        'size' => 'small',
         'unsigned' => TRUE,
         'not null' => TRUE,
         'default' => 0,
@@ -142,4 +141,13 @@ function uc_cart_update_6200() {
     array('primary key' => array('cart_item_id'),)
   );
   return $ret;
-}
\ No newline at end of file
+}
+
+/**
+ * Increase the size of the quantities field from short int to int
+ */
+function uc_cart_update_6201() {
+  $ret = array();
+  db_change_field($ret, 'uc_cart_products', 'qty', 'qty', array('type' => 'int', 'unsigned' => TRUE, 'not null' => TRUE, 'default' => 0));
+  return $ret;
+}