diff --git a/groups.php b/groups.php
index 1dba8e1..f2b664e 100644
--- a/groups.php
+++ b/groups.php
@@ -21,13 +21,13 @@
  * Plugin Name: Groups
  * Plugin URI: http://www.itthinx.com/plugins/groups
  * Description: Groups provides group-based user membership management, group-based capabilities and content access control.
- * Version: 1.5.0
+ * Version: 1.5.1
  * Author: itthinx
  * Author URI: http://www.itthinx.com
  * Donate-Link: http://www.itthinx.com
  * License: GPLv3
  */
-define( 'GROUPS_CORE_VERSION', '1.5.0' );
+define( 'GROUPS_CORE_VERSION', '1.5.1' );
 define( 'GROUPS_FILE', __FILE__ );
 if ( !defined( 'GROUPS_CORE_DIR' ) ) {
 	define( 'GROUPS_CORE_DIR', WP_PLUGIN_DIR . '/groups' );
diff --git a/lib/core/class-groups-controller.php b/lib/core/class-groups-controller.php
index c169948..4c223d7 100644
--- a/lib/core/class-groups-controller.php
+++ b/lib/core/class-groups-controller.php
@@ -169,7 +169,7 @@ class         VARCHAR(255) DEFAULT NULL,
 				name          VARCHAR(100) DEFAULT NULL,
 				description   LONGTEXT DEFAULT NULL,
 				PRIMARY KEY   (capability_id),
-				UNIQUE INDEX  capability (capability(20)),
+				UNIQUE INDEX  capability (capability(100)),
 				INDEX         capability_kco (capability(20),class(20),object(20))
 			) $charset_collate;";
 		}
@@ -270,9 +270,9 @@ public static function update( $previous_version ) {
 						Groups_Options::update_option( Groups_Post_Access::READ_POST_CAPABILITIES, array( Groups_Post_Access::READ_POST_CAPABILITY ) );
 						$wpdb->query( $wpdb->prepare( "UPDATE $wpdb->postmeta SET meta_value = %s WHERE meta_key = %s", Groups_Post_Access::READ_POST_CAPABILITY, Groups_Post_Access::POSTMETA_PREFIX . Groups_Post_Access::READ_POST_CAPABILITY ) );
 					}
-					if ( strcmp( $previous_version, '1.5.0' ) < 0 ) {
+					if ( strcmp( $previous_version, '1.5.1' ) < 0 ) {
 						$capability_table = _groups_get_tablename( 'capability' );
-						$queries[] = "ALTER TABLE $capability_table DROP INDEX capability, ADD UNIQUE INDEX capability(capability(20));";
+						$queries[] = "ALTER TABLE $capability_table DROP INDEX capability, ADD UNIQUE INDEX capability(capability(100));";
 					}
 				}
 		} // switch
diff --git a/readme.txt b/readme.txt
index 70ed652..3f2f4f4 100644
--- a/readme.txt
+++ b/readme.txt
@@ -177,6 +177,11 @@ See also [Groups](http://www.itthinx.com/plugins/groups/)
 
 == Changelog ==
 
+= 1.5.1 =
+* Please **MAKE A BACKUP** of your site and database PRIOR to updating.
+* WordPress 4.2 compatible.
+* Adopted a more flexible index size on the capability row of the capability table.
+
 = 1.5.0 =
 * Please **MAKE A BACKUP** of your site and database PRIOR to updating.
 * WordPress 4.2 compatible.
@@ -430,6 +435,6 @@ Some installations wouldn't work correctly, showing no capabilities and making i
 
 == Upgrade Notice ==
 
-= 1.5.0 =
+= 1.5.1 =
 Please **MAKE A BACKUP** of your site and database PRIOR to updating.
 This release is required for compatibility with WordPress 4.2 and above (uses a reduced index size on a database table).