diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9e0e2bb..cc8f997 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,3 +4,7 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## 0.3.1
+
+- Deprecated calling `types::alias()`, `types::template()` and `types::object()` with named arguments.
diff --git a/types.php b/types.php
index 843a93e..4a2b432 100644
--- a/types.php
+++ b/types.php
@@ -47,7 +47,13 @@ enum types implements Type
      */
     public static function alias(string $class, string $name, Type ...$arguments): Type
     {
-        return new Internal\AliasType($class, $name, array_values($arguments));
+        if (!array_is_list($arguments)) {
+            trigger_deprecation('typhoon/type', '0.3.1', 'Calling %s() with named arguments is deprecated.', __METHOD__);
+            /** @var list<Type> */
+            $arguments = array_values($arguments);
+        }
+
+        return new Internal\AliasType($class, $name, $arguments);
     }
 
     /**
@@ -344,7 +350,13 @@ public static function object(string $class, Type ...$arguments): Type
             return self::closure;
         }
 
-        return new Internal\NamedObjectType($class, array_values($arguments));
+        if (!array_is_list($arguments)) {
+            trigger_deprecation('typhoon/type', '0.3.1', 'Calling %s() with named arguments is deprecated.', __METHOD__);
+            /** @var list<Type> */
+            $arguments = array_values($arguments);
+        }
+
+        return new Internal\NamedObjectType($class, $arguments);
     }
 
     /**
@@ -389,7 +401,13 @@ public static function prop(Type $type, bool $optional = false): Property
      */
     public static function template(string $name, AtMethod|AtClass|AtFunction $declaredAt, Type ...$arguments): Type
     {
-        return new Internal\TemplateType($name, $declaredAt, array_values($arguments));
+        if (!array_is_list($arguments)) {
+            trigger_deprecation('typhoon/type', '0.3.1', 'Calling %s() with named arguments is deprecated.', __METHOD__);
+            /** @var list<Type> */
+            $arguments = array_values($arguments);
+        }
+
+        return new Internal\TemplateType($name, $declaredAt, $arguments);
     }
 
     /**