diff --git a/db/install.xml b/db/install.xml
index bf40a99..0f7b83c 100644
--- a/db/install.xml
+++ b/db/install.xml
@@ -1,8 +1,9 @@
+
 <?xml version="1.0" encoding="UTF-8" ?>
-<XMLDB PATH="mod/attendance/db" VERSION="20130704" COMMENT="XMLDB file for Moodle mod/attendance"
-    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-    xsi:noNamespaceSchemaLocation="../../../lib/xmldb/xmldb.xsd"
->
+<XMLDB PATH="mod/attendance/db" VERSION="20160829" COMMENT="XMLDB file for Moodle mod/attendance"
+       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xsi:noNamespaceSchemaLocation="../../../lib/xmldb/xmldb.xsd"
+        >
   <TABLES>
     <TABLE NAME="attendance" COMMENT="Attendance module table">
       <FIELDS>
@@ -10,6 +11,7 @@
         <FIELD NAME="course" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false"/>
         <FIELD NAME="name" TYPE="char" LENGTH="255" NOTNULL="false" SEQUENCE="false"/>
         <FIELD NAME="grade" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="100" SEQUENCE="false" COMMENT="This is maximum grade for instance"/>
+        <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="The time the settings for this attendance instance were last modified."/>
       </FIELDS>
       <KEYS>
         <KEY NAME="primary" TYPE="primary" FIELDS="id" COMMENT="Primary key for attendance"/>
@@ -30,7 +32,7 @@
         <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="false" SEQUENCE="false"/>
         <FIELD NAME="description" TYPE="text" NOTNULL="true" SEQUENCE="false"/>
         <FIELD NAME="descriptionformat" TYPE="int" LENGTH="2" NOTNULL="true" DEFAULT="0" SEQUENCE="false"/>
-        <FIELD NAME="studentscanmark" TYPE="int" LENGTH="1" NOTNULL="true" UNSIGNED="true" DEFAULT="0" SEQUENCE="false"/>
+        <FIELD NAME="studentscanmark" TYPE="int" LENGTH="1" NOTNULL="true" DEFAULT="0" SEQUENCE="false"/>
         <FIELD NAME="statusset" TYPE="int" LENGTH="5" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Which set of statuses to use"/>
         <FIELD NAME="caleventid" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false"/>
       </FIELDS>
diff --git a/db/upgrade.php b/db/upgrade.php
index dcdf3e0..3485f7f 100644
--- a/db/upgrade.php
+++ b/db/upgrade.php
@@ -177,5 +177,20 @@ function xmldb_attendance_upgrade($oldversion=0) {
         upgrade_mod_savepoint(true, 2016052202, 'attendance');
     }
 
+    if ($oldversion < 2016082900) {
+
+        // Define field timemodified to be added to attendance.
+        $table = new xmldb_table('attendance');
+        $field = new xmldb_field('timemodified', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, null, '0', 'grade');
+
+        // Conditionally launch add field timemodified.
+        if (!$dbman->field_exists($table, $field)) {
+            $dbman->add_field($table, $field);
+        }
+
+        // Attendance savepoint reached.
+        upgrade_mod_savepoint(true, 2016082900, 'attendance');
+    }
+
     return $result;
 }
diff --git a/version.php b/version.php
index 4ed5a32..39e624d 100644
--- a/version.php
+++ b/version.php
@@ -22,9 +22,9 @@
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
-$plugin->version  = 2016052202;
+$plugin->version  = 2016082900;
 $plugin->requires = 2016052300;
-$plugin->release = '3.1.1.0';
+$plugin->release = '3.1.1.1';
 $plugin->maturity  = MATURITY_STABLE;
 $plugin->cron     = 0;
 $plugin->component = 'mod_attendance';