diff --git a/lib/db/install.xml b/lib/db/install.xml
index 8bcf134caa9..e2ccdc0dbdf 100644
--- a/lib/db/install.xml
+++ b/lib/db/install.xml
@@ -1927,7 +1927,7 @@
         <FIELD NAME="aggregateoutcomes" TYPE="int" LENGTH="1" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Aggregate outcomes"/>
         <FIELD NAME="timecreated" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="false"/>
         <FIELD NAME="timemodified" TYPE="int" LENGTH="10" NOTNULL="true" SEQUENCE="false"/>
-        <FIELD NAME="hidden" TYPE="int" LENGTH="1" NOTNULL="true" DEFAULT="0" SEQUENCE="false"/>
+        <FIELD NAME="hidden" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false"/>
       </FIELDS>
       <KEYS>
         <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
@@ -2068,7 +2068,7 @@
         <FIELD NAME="aggregateonlygraded" TYPE="int" LENGTH="1" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="aggregate only graded items"/>
         <FIELD NAME="aggregateoutcomes" TYPE="int" LENGTH="1" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="Aggregate outcomes"/>
         <FIELD NAME="aggregatesubcats" TYPE="int" LENGTH="1" NOTNULL="true" DEFAULT="0" SEQUENCE="false" COMMENT="This setting was removed from grade_categories. It is kept here only to preserve history."/>
-        <FIELD NAME="hidden" TYPE="int" LENGTH="1" NOTNULL="true" DEFAULT="0" SEQUENCE="false"/>
+        <FIELD NAME="hidden" TYPE="int" LENGTH="10" NOTNULL="true" DEFAULT="0" SEQUENCE="false"/>
       </FIELDS>
       <KEYS>
         <KEY NAME="primary" TYPE="primary" FIELDS="id"/>
diff --git a/lib/db/upgrade.php b/lib/db/upgrade.php
index 3779a9a7992..d98304772b9 100644
--- a/lib/db/upgrade.php
+++ b/lib/db/upgrade.php
@@ -4494,5 +4494,25 @@ privatefiles,moodle|/user/files.php';
         upgrade_main_savepoint(true, 2022041900.03);
     }
 
+    if ($oldversion < 2022041901.05) {
+
+        // Changing precision of field hidden on table grade_categories to (10).
+        $table = new xmldb_table('grade_categories');
+        $field = new xmldb_field('hidden', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, null, '0', 'timemodified');
+
+        // Launch change of precision for field hidden.
+        $dbman->change_field_precision($table, $field);
+
+        // Changing precision of field hidden on table grade_categories_history to (10).
+        $table = new xmldb_table('grade_categories_history');
+        $field = new xmldb_field('hidden', XMLDB_TYPE_INTEGER, '10', null, XMLDB_NOTNULL, null, '0', 'aggregatesubcats');
+
+        // Launch change of precision for field hidden.
+        $dbman->change_field_precision($table, $field);
+
+        // Main savepoint reached.
+        upgrade_main_savepoint(true, 2022041901.05);
+    }
+
     return true;
 }
diff --git a/version.php b/version.php
index c74d2297f9e..8214cb84d84 100644
--- a/version.php
+++ b/version.php
@@ -29,7 +29,7 @@
 
 defined('MOODLE_INTERNAL') || die();
 
-$version  = 2022041901.04;              // 20220419      = branching date YYYYMMDD - do not modify!
+$version  = 2022041901.05;              // 20220419      = branching date YYYYMMDD - do not modify!
                                         //         RR    = release increments - 00 in DEV branches.
                                         //           .XX = incremental changes.
 $release  = '4.0.1+ (Build: 20220603)'; // Human-friendly version name