diff --git a/admin/rules/date.php b/admin/rules/date.php
index 1c196f8..fdf7d46 100644
--- a/admin/rules/date.php
+++ b/admin/rules/date.php
@@ -13,7 +13,7 @@
 
 class JFormRuleDate extends FormRule
 {
-	public function test(SimpleXMLElement $element, $value, $group = null, Registry $input = null, Form $form = null)
+	public function test(SimpleXMLElement $element, $value, $group = null, ?Registry $input = null, ?Form $form = null)
 	{
 		if ($value === '' || $value === null)
 		{
diff --git a/admin/rules/emaillist.php b/admin/rules/emaillist.php
index f1d7aed..62923ec 100644
--- a/admin/rules/emaillist.php
+++ b/admin/rules/emaillist.php
@@ -19,7 +19,7 @@
  */
 class JFormRuleEmaillist extends FormRule
 {
-	public function test(SimpleXMLElement $element, $value, $group = null, Registry $input = null, Form $form = null)
+	public function test(SimpleXMLElement $element, $value, $group = null, ?Registry $input = null, ?Form $form = null)
 	{
 		$value = trim((string) $value);
 		if ($value === '')
diff --git a/admin/rules/geodbpath.php b/admin/rules/geodbpath.php
index f8d015d..5acfc25 100644
--- a/admin/rules/geodbpath.php
+++ b/admin/rules/geodbpath.php
@@ -14,7 +14,7 @@
 
 class JFormRuleGeodbpath extends FormRule
 {
-	public function test(SimpleXMLElement $element, $value, $group = null, Registry $input = null, Form $form = null)
+	public function test(SimpleXMLElement $element, $value, $group = null, ?Registry $input = null, ?Form $form = null)
 	{
 		$value = (string) $value;
 		if ($value === '')
diff --git a/admin/rules/htaccesspath.php b/admin/rules/htaccesspath.php
index 93dc188..eb1b1e1 100644
--- a/admin/rules/htaccesspath.php
+++ b/admin/rules/htaccesspath.php
@@ -14,7 +14,7 @@
 
 class JFormRuleHtaccesspath extends FormRule
 {
-	public function test(SimpleXMLElement $element, $value, $group = null, Registry $input = null, Form $form = null)
+	public function test(SimpleXMLElement $element, $value, $group = null, ?Registry $input = null, ?Form $form = null)
 	{
 		$value = (string) $value;
 		if ($value === '')
diff --git a/admin/rules/iprange.php b/admin/rules/iprange.php
index 256ea36..6a7524c 100644
--- a/admin/rules/iprange.php
+++ b/admin/rules/iprange.php
@@ -14,7 +14,7 @@
 
 class JFormRuleIprange extends FormRule
 {
-	public function test(SimpleXMLElement $element, $value, $group = null, Registry $input = null, Form $form = null)
+	public function test(SimpleXMLElement $element, $value, $group = null, ?Registry $input = null, ?Form $form = null)
 	{
 		return IpValidateHelper::validIPRange($value);
 	}
diff --git a/admin/rules/iprangeblock.php b/admin/rules/iprangeblock.php
index 5942d8c..4803942 100644
--- a/admin/rules/iprangeblock.php
+++ b/admin/rules/iprangeblock.php
@@ -14,7 +14,7 @@
 
 class JFormRuleIprangeblock extends FormRule
 {
-	public function test(SimpleXMLElement $element, $value, $group = null, Registry $input = null, Form $form = null)
+	public function test(SimpleXMLElement $element, $value, $group = null, ?Registry $input = null, ?Form $form = null)
 	{
 		return (IpValidateHelper::validIPRange($value) && !IpValidateHelper::matchesCurrentIP($value));
 	}