diff --git a/README.md b/README.md
index 1e629f3..2dc55b6 100644
--- a/README.md
+++ b/README.md
@@ -19,11 +19,11 @@ Szkielet komponentu Joomla 6 do gromadzenia pytań testowych.
 - opcjonalne zdjęcie wybierane z Media Managera,
 - publikowanie, filtrowanie i usuwanie pytań w panelu administratora,
 - tworzenie zestawów pytań w panelu administratora i przypisywanie do nich pytań,
-- czas trwania, treść i obraz zestawu testowego,
+- czas trwania w sekundach (suwak), treść i obraz zestawu testowego,
 - tabela `#__testquestions_questions` tworzona podczas instalacji.
 
 ## Instalacja
 
-W Joomla wybierz **System → Install → Install from Folder** i wskaż ten katalog. Manifestem instalacyjnym jest `com_testquestions.xml` (wersja 1.12.4).
+W Joomla wybierz **System → Install → Install from Folder** i wskaż ten katalog. Manifestem instalacyjnym jest `com_testquestions.xml` (wersja 1.13.0).
 
 Po instalacji komponent jest dostępny w panelu administratora jako **Pytania testowe**.
diff --git a/administrator/components/com_testquestions/forms/set.xml b/administrator/components/com_testquestions/forms/set.xml
index c40aab8..4849e53 100644
--- a/administrator/components/com_testquestions/forms/set.xml
+++ b/administrator/components/com_testquestions/forms/set.xml
@@ -6,7 +6,7 @@
         <field name="subject_id" type="sql" label="COM_TESTQUESTIONS_SUBJECT" required="true" query="SELECT id, title FROM #__testquestions_subjects WHERE published = 1 ORDER BY title ASC" key_field="id" value_field="title" translate_query="false">
             <option value="0">COM_TESTQUESTIONS_SELECT_SUBJECT</option>
         </field>
-        <field name="duration" type="number" label="COM_TESTQUESTIONS_SET_DURATION" description="COM_TESTQUESTIONS_SET_DURATION_DESC" min="0" max="1440" filter="integer" />
+        <field name="duration" type="range" label="COM_TESTQUESTIONS_SET_DURATION" description="COM_TESTQUESTIONS_SET_DURATION_DESC" min="0" max="3600" step="30" default="0" filter="integer" />
         <field name="test_content" type="editor" label="COM_TESTQUESTIONS_SET_TEST_CONTENT" buttons="true" filter="safehtml" height="150" />
         <field name="image" type="media" label="COM_TESTQUESTIONS_SET_IMAGE" directory="images/testquestions" preview="tooltip" />
         <field name="description" type="textarea" label="COM_TESTQUESTIONS_SET_DESCRIPTION" rows="4" filter="raw" />
diff --git a/administrator/components/com_testquestions/language/en-GB/com_testquestions.ini b/administrator/components/com_testquestions/language/en-GB/com_testquestions.ini
index 697a8cb..5b9acab 100644
--- a/administrator/components/com_testquestions/language/en-GB/com_testquestions.ini
+++ b/administrator/components/com_testquestions/language/en-GB/com_testquestions.ini
@@ -58,8 +58,8 @@ COM_TESTQUESTIONS_SET_ALL_CATEGORIES="Wszystkie kategorie"
 COM_TESTQUESTIONS_UNCATEGORIZED="Bez kategorii"
 COM_TESTQUESTIONS_SET_SHOW_DETAILS="Pokaż odpowiedzi"
 COM_TESTQUESTIONS_SUBJECTS="Przedmioty"
-COM_TESTQUESTIONS_SET_DURATION="Czas trwania testu (minuty)"
-COM_TESTQUESTIONS_SET_DURATION_DESC="Podaj czas trwania testu w minutach."
+COM_TESTQUESTIONS_SET_DURATION="Czas trwania testu (sekundy)"
+COM_TESTQUESTIONS_SET_DURATION_DESC="Ustaw czas trwania testu w sekundach za pomocą suwaka."
 COM_TESTQUESTIONS_SET_TEST_CONTENT="Treść testu"
 COM_TESTQUESTIONS_SET_IMAGE="Obraz testu"
 COM_TESTQUESTIONS_SUBJECT="Przedmiot"
diff --git a/administrator/components/com_testquestions/sql/updates/mysql/1.13.0.sql b/administrator/components/com_testquestions/sql/updates/mysql/1.13.0.sql
new file mode 100644
index 0000000..504fd49
--- /dev/null
+++ b/administrator/components/com_testquestions/sql/updates/mysql/1.13.0.sql
@@ -0,0 +1,3 @@
+UPDATE `#__testquestions_sets`
+SET `duration` = `duration` * 60
+WHERE `duration` > 0;
diff --git a/administrator/components/com_testquestions/tmpl/set/edit.php b/administrator/components/com_testquestions/tmpl/set/edit.php
index 24f49ad..7e1f5cb 100644
--- a/administrator/components/com_testquestions/tmpl/set/edit.php
+++ b/administrator/components/com_testquestions/tmpl/set/edit.php
@@ -12,6 +12,7 @@ HTMLHelper::_('behavior.formvalidator');
         <?php echo $this->form->renderField('title'); ?>
         <?php echo $this->form->renderField('subject_id'); ?>
         <?php echo $this->form->renderField('duration'); ?>
+        <output id="set-duration-value" class="form-text mb-3"></output>
         <?php echo $this->form->renderField('test_content'); ?>
         <?php echo $this->form->renderField('image'); ?>
         <?php echo $this->form->renderField('description'); ?>
@@ -101,3 +102,20 @@ document.addEventListener('DOMContentLoaded', function () {
     });
 });
 </script>
+<script>
+document.addEventListener('DOMContentLoaded', function () {
+    const duration = document.getElementById('jform_duration');
+    const output = document.getElementById('set-duration-value');
+
+    if (!duration || !output) {
+        return;
+    }
+
+    const updateDuration = function () {
+        output.textContent = duration.value + ' s';
+    };
+
+    duration.addEventListener('input', updateDuration);
+    updateDuration();
+});
+</script>
diff --git a/com_testquestions.xml b/com_testquestions.xml
index c57a8c1..d7ca1b5 100644
--- a/com_testquestions.xml
+++ b/com_testquestions.xml
@@ -4,7 +4,7 @@
     <creationDate>2026-10-14</creationDate>
     <author>Komponent</author>
     <license>GNU General Public License version 2 or later</license>
-    <version>1.12.4</version>
+    <version>1.13.0</version>
     <description>COM_TESTQUESTIONS_DESCRIPTION</description>
     <element>com_testquestions</element>
     <namespace path="src">Komponent\Component\Testquestions</namespace>