diff --git a/administrator/components/com_admin/sql/updates/mysql/3.5.0-2015-07-01.sql b/administrator/components/com_admin/sql/updates/mysql/3.5.0-2015-07-01.sql
index 26298a96f0655..a798f10bbfe76 100644
--- a/administrator/components/com_admin/sql/updates/mysql/3.5.0-2015-07-01.sql
+++ b/administrator/components/com_admin/sql/updates/mysql/3.5.0-2015-07-01.sql
@@ -5,9 +5,9 @@ ALTER TABLE `#__menu` DROP KEY `idx_client_id_parent_id_alias_language`, ADD UNI
 
 ALTER TABLE `#__redirect_links` DROP KEY `idx_link_old`, ADD UNIQUE KEY `idx_link_old` (`old_url`(100));
 
-ALTER TABLE `#__session` MODIFY `session_id` varchar(400) NOT NULL DEFAULT '';
+ALTER TABLE `#__session` MODIFY `session_id` varchar(191) NOT NULL DEFAULT '';
 
-ALTER TABLE `#__user_keys` MODIFY `series` varchar(400) NOT NULL;
+ALTER TABLE `#__user_keys` MODIFY `series` varchar(191) NOT NULL;
 
 -- Convert all tables to UTF-8 Multibyte (utf8mb4)
 ALTER TABLE `#__assets` CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
diff --git a/installation/sql/mysql/joomla.sql b/installation/sql/mysql/joomla.sql
index 7325abbcad12a..8ec724225a09d 100644
--- a/installation/sql/mysql/joomla.sql
+++ b/installation/sql/mysql/joomla.sql
@@ -1551,7 +1551,7 @@ CREATE TABLE IF NOT EXISTS `#__schemas` (
 --
 
 CREATE TABLE IF NOT EXISTS `#__session` (
-  `session_id` varchar(400) NOT NULL DEFAULT '',
+  `session_id` varchar(191) NOT NULL DEFAULT '',
   `client_id` tinyint(3) unsigned NOT NULL DEFAULT 0,
   `guest` tinyint(4) unsigned DEFAULT 1,
   `time` varchar(14) DEFAULT '',
@@ -1885,7 +1885,7 @@ CREATE TABLE IF NOT EXISTS `#__user_keys` (
   `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
   `user_id` varchar(255) NOT NULL,
   `token` varchar(255) NOT NULL,
-  `series` varchar(400) NOT NULL,
+  `series` varchar(191) NOT NULL,
   `invalid` tinyint(4) NOT NULL,
   `time` varchar(200) NOT NULL,
   `uastring` varchar(255) NOT NULL,