diff --git a/install.sql b/install.sql
index 1acc849f..26d21edc 100644
--- a/install.sql
+++ b/install.sql
@@ -303,7 +303,7 @@ CREATE TABLE IF NOT EXISTS `ban_appeals` (
 -- Table structure for table `pages`
 --
 
-CREATE TABLE `pages` (
+CREATE TABLE IF NOT EXISTS `pages` (
   `id` int(11) NOT NULL AUTO_INCREMENT,
   `board` varchar(58) CHARACTER SET utf8 DEFAULT NULL,
   `name` varchar(255) CHARACTER SET utf8 NOT NULL,
@@ -320,7 +320,7 @@ CREATE TABLE `pages` (
 -- Table structure for table `nntp_references`
 --
 
-CREATE TABLE `nntp_references` (
+CREATE TABLE IF NOT EXISTS `nntp_references` (
   `board` varchar(30) NOT NULL,
   `id` int(11) unsigned NOT NULL,
   `message_id` varchar(255) CHARACTER SET ascii NOT NULL,
@@ -332,6 +332,20 @@ CREATE TABLE `nntp_references` (
   UNIQUE KEY `u_board_id` (`board`, `id`)
 ) ENGINE=MyISAM DEFAULT CHARSET=utf8mb4;
 
+-- --------------------------------------------------------
+
+--
+-- Table structure for table `captchas`
+--
+
+CREATE TABLE IF NOT EXISTS `captchas` (
+  `cookie` VARCHAR(50),
+  `extra` VARCHAR(200),
+  `text` VARCHAR(255),
+  `created_at` INT(11),
+  PRIMARY KEY (cookie, extra)
+) ENGINE=MyISAM  DEFAULT CHARSET=utf8mb4;
+
 
 /*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
 /*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;