diff --git a/app/code/core/Mage/Paypal/Model/Ipn.php b/app/code/core/Mage/Paypal/Model/Ipn.php
index 2e5a1ea2550..aaddaa7ce89 100644
--- a/app/code/core/Mage/Paypal/Model/Ipn.php
+++ b/app/code/core/Mage/Paypal/Model/Ipn.php
@@ -559,7 +559,7 @@ protected function _registerPaymentRefund()
             ->setTransactionId($this->getRequestData('txn_id'))
             ->setParentTransactionId($this->getRequestData('parent_txn_id'))
             ->setIsTransactionClosed($isRefundFinal)
-            ->registerRefundNotification(-1 * $this->getRequestData('mc_gross'));
+            ->registerRefundNotification(-1 * (float)$this->getRequestData('mc_gross'));
         $this->_order->addStatusHistoryComment($comment, false);
         $this->_order->save();
 
diff --git a/app/code/core/Mage/Rule/Model/Abstract.php b/app/code/core/Mage/Rule/Model/Abstract.php
index 220ec819388..d3919683542 100644
--- a/app/code/core/Mage/Rule/Model/Abstract.php
+++ b/app/code/core/Mage/Rule/Model/Abstract.php
@@ -319,10 +319,7 @@ protected function _convertFlatToRecursive(array $data)
                     $path = explode('--', $id);
                     $node =& $arr;
                     for ($i = 0, $l = count($path); $i < $l; $i++) {
-                        if (!isset($node[$key][$path[$i]])) {
-                            $node[$key][$path[$i]] = [];
-                        }
-                        $node =& $node[$key][$path[$i]];
+                        $node =& $node[$key][$path[$i]] ?? [];
                     }
                     foreach ($data as $k => $v) {
                         $node[$k] = $v;
diff --git a/composer.lock b/composer.lock
index 76561ece7f7..bb3ed52bb62 100644
--- a/composer.lock
+++ b/composer.lock
@@ -3372,16 +3372,16 @@
         },
         {
             "name": "phpstan/phpstan",
-            "version": "1.10.21",
+            "version": "1.10.22",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpstan/phpstan.git",
-                "reference": "b2a30186be2e4d97dce754ae4e65eb0ec2f04eb5"
+                "reference": "97d694dfd4ceb57bcce4e3b38548f13ea62e4287"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/b2a30186be2e4d97dce754ae4e65eb0ec2f04eb5",
-                "reference": "b2a30186be2e4d97dce754ae4e65eb0ec2f04eb5",
+                "url": "https://api.github.com/repos/phpstan/phpstan/zipball/97d694dfd4ceb57bcce4e3b38548f13ea62e4287",
+                "reference": "97d694dfd4ceb57bcce4e3b38548f13ea62e4287",
                 "shasum": ""
             },
             "require": {
@@ -3430,7 +3430,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2023-06-21T20:07:58+00:00"
+            "time": "2023-06-30T20:04:11+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
diff --git a/phpstan.dist.baseline.neon b/phpstan.dist.baseline.neon
index 538f183df0d..1acbbf15087 100644
--- a/phpstan.dist.baseline.neon
+++ b/phpstan.dist.baseline.neon
@@ -3670,11 +3670,6 @@ parameters:
 			count: 1
 			path: app/code/core/Mage/Rss/Helper/Data.php
 
-		-
-			message: "#^Offset 'actions'\\|'conditions' on array\\{\\} in isset\\(\\) does not exist\\.$#"
-			count: 1
-			path: app/code/core/Mage/Rule/Model/Abstract.php
-
 		-
 			message: "#^Property Mage_Rule_Model_Abstract\\:\\:\\$_conditions \\(Mage_Rule_Model_Condition_Combine\\) in empty\\(\\) is not falsy\\.$#"
 			count: 1