diff --git a/showmore_dyn/showmore_dyn.php b/showmore_dyn/showmore_dyn.php
index 41de11a3..73eb7b17 100644
--- a/showmore_dyn/showmore_dyn.php
+++ b/showmore_dyn/showmore_dyn.php
@@ -41,7 +41,7 @@ function showmore_dyn_settings_post()
 	}
 
 	if (isset($_POST['showmore_dyn-submit'])) {
-		$limitHeight = $_POST['showmore_dyn_height'];
+		$limitHeight = $_POST['limitHeight'];
 		if ($limitHeight && is_numeric($limitHeight)) {
 			DI::pConfig()->set(local_user(), 'showmore_dyn', 'limitHeight', $limitHeight);
 		}
@@ -62,7 +62,7 @@ function showmore_dyn_settings(App &$a, &$o)
 		'$submit' => DI::l10n()->t('Save Settings'),
 		'$title' => 'Showmore Dynamic',
 		'$label' => DI::l10n()->t('Limit Height'),
-		'$limitHeight' => $limitHeight,
+		'$limitHeight' => ['limitHeight', DI::l10n()->t('Limit Height'), $limitHeight, 'The maximal height of posts when collapsed', '', '', 'number'],
 	]);
 
 }
diff --git a/showmore_dyn/templates/settings.tpl b/showmore_dyn/templates/settings.tpl
index 782d1fdf..5e8bc3f1 100644
--- a/showmore_dyn/templates/settings.tpl
+++ b/showmore_dyn/templates/settings.tpl
@@ -1,9 +1,6 @@
 <div class="settings-block">
 	<h3 class="settings-heading">{{$title}}</h3>
-	<div class='field noedit'>
-		<label>{{$label}}</label>
-		<input id="showmore_dyn_height" name="showmore_dyn_height" value="{{$limitHeight}}" />
-	</div>
+	{{include file="field_input.tpl" field=$limitHeight}}
 
 	<div class="settings-submit-wrapper">
 		<input type="submit" value="{{$submit}}" class="settings-submit" name="showmore_dyn-submit" />