diff --git a/rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForJsonArrayRector/Fixture/json_utils_with_named_arg.php.inc b/rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForJsonArrayRector/Fixture/json_utils_with_named_arg.php.inc
new file mode 100644
index 00000000000..bf95e165f87
--- /dev/null
+++ b/rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForJsonArrayRector/Fixture/json_utils_with_named_arg.php.inc
@@ -0,0 +1,38 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\TypeDeclarationDocblocks\Rector\ClassMethod\AddReturnDocblockForJsonArrayRector\Fixture;
+
+use Nette\Utils\Json;
+
+final class JsonUtilsWithNamedArg
+{
+    public function provide(string $contents): array
+    {
+        return Json::decode(forceArrays: true, json: $contents);
+    }
+}
+
+?>
+-----
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\TypeDeclarationDocblocks\Rector\ClassMethod\AddReturnDocblockForJsonArrayRector\Fixture;
+
+use Nette\Utils\Json;
+
+final class JsonUtilsWithNamedArg
+{
+    /**
+     * @return array<string, mixed>
+     */
+    public function provide(string $contents): array
+    {
+        return Json::decode(forceArrays: true, json: $contents);
+    }
+}
+
+?>
diff --git a/rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForJsonArrayRector/Fixture/with_named_arg.php.inc b/rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForJsonArrayRector/Fixture/with_named_arg.php.inc
new file mode 100644
index 00000000000..eaa236e3283
--- /dev/null
+++ b/rules-tests/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForJsonArrayRector/Fixture/with_named_arg.php.inc
@@ -0,0 +1,34 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\TypeDeclarationDocblocks\Rector\ClassMethod\AddReturnDocblockForJsonArrayRector\Fixture;
+
+final class WithNamedArg
+{
+    public function provide(string $contents): array
+    {
+        return json_decode(associative: true, json: $contents);
+    }
+}
+
+?>
+-----
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\Tests\TypeDeclarationDocblocks\Rector\ClassMethod\AddReturnDocblockForJsonArrayRector\Fixture;
+
+final class WithNamedArg
+{
+    /**
+     * @return array<string, mixed>
+     */
+    public function provide(string $contents): array
+    {
+        return json_decode(associative: true, json: $contents);
+    }
+}
+
+?>
diff --git a/rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForJsonArrayRector.php b/rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForJsonArrayRector.php
index e88d174cc77..29d32ec4606 100644
--- a/rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForJsonArrayRector.php
+++ b/rules/TypeDeclarationDocblocks/Rector/ClassMethod/AddReturnDocblockForJsonArrayRector.php
@@ -5,6 +5,7 @@
 namespace Rector\TypeDeclarationDocblocks\Rector\ClassMethod;
 
 use PhpParser\Node;
+use PhpParser\Node\Arg;
 use PhpParser\Node\Expr;
 use PhpParser\Node\Expr\FuncCall;
 use PhpParser\Node\Expr\StaticCall;
@@ -139,12 +140,12 @@ private function isJsonDecodeToArray(Expr $expr): bool
                 return false;
             }
 
-            if (count($expr->getArgs()) !== 2) {
+            $arg = $expr->getArg('associative', 1);
+            if (! $arg instanceof Arg) {
                 return false;
             }
 
-            $secondArg = $expr->getArgs()[1];
-            return $this->valueResolver->isTrue($secondArg->value);
+            return $this->valueResolver->isTrue($arg->value);
         }
 
         if ($expr instanceof StaticCall) {
@@ -160,12 +161,12 @@ private function isJsonDecodeToArray(Expr $expr): bool
                 return false;
             }
 
-            if (count($expr->getArgs()) !== 2) {
+            $arg = $expr->getArg('forceArrays', 1);
+            if (! $arg instanceof Arg) {
                 return false;
             }
 
-            $secondArg = $expr->getArgs()[1];
-            return $this->valueResolver->isTrue($secondArg->value);
+            return $this->valueResolver->isTrue($arg->value);
         }
 
         return false;