diff --git a/CHANGELOG.md b/CHANGELOG.md
index fae9c7d..30cab1d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,11 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 - Add support for PHP 8.2
 
+### Deprecated
+
+- Providing Argument #1 ($key) in `\Art4\JsonApiClient\Accessable::has()` not as `int|string` is deprecated and will throw an Exception in 2.0.0.
+- Providing Argument #1 ($key) in `\Art4\JsonApiClient\Accessable::get()` not as `int|string` is deprecated and will throw an Exception in 2.0.0.
+
 ## [1.1.0 - 2021-10-05](https://github.com/Art4/json-api-client/compare/1.0.0...1.1.0)
 
 ### Added
@@ -25,16 +30,16 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ### Deprecated
 
-- `\Art4\JsonApiClient\Accessable::has()` will add `bool` as a native return type declaration in v2.0, do the same in your implementation now to avoid errors.
-- `\Art4\JsonApiClient\Accessable::getKeys()` will add `array` as a native return type declaration in v2.0, do the same in your implementation now to avoid errors.
-- `\Art4\JsonApiClient\Exception\Exception` will extend `\Throwable` in v2.0, do the same in your implementation now to avoid errors.
-- `\Art4\JsonApiClient\Factory::make()` methods first parameter signature will be `string` in v2.0.
-- `\Art4\JsonApiClient\Factory::make()` will add `\Art4\JsonApiClient\Accessable` as a native return type declaration in v2.0, do the same in your implementation now to avoid errors.
-- `\Art4\JsonApiClient\Input\Input::getAsObject()` will add `\stdClass` as a native return type declaration in v2.0, do the same in your implementation now to avoid errors.
-- `\Art4\JsonApiClient\Manager::parse()` will add `\Art4\JsonApiClient\Accessable` as a native return type declaration in v2.0, do the same in your implementation now to avoid errors.
-- `\Art4\JsonApiClient\Manager::getFactory()` will add `\Art4\JsonApiClient\Factory` as a native return type declaration in v2.0, do the same in your implementation now to avoid errors.
-- `\Art4\JsonApiClient\Manager::getParam()` methods first parameter signature will be `string` in v2.0.
-- `\Art4\JsonApiClient\Serializer\Serializer::serialize()` will add `?array` as a native return type declaration in v2.0, do the same in your implementation now to avoid errors.
+- `\Art4\JsonApiClient\Accessable::has()` will add `bool` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
+- `\Art4\JsonApiClient\Accessable::getKeys()` will add `array` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
+- `\Art4\JsonApiClient\Exception\Exception` will extend `\Throwable` in 2.0.0, do the same in your implementation now to avoid errors.
+- `\Art4\JsonApiClient\Factory::make()` methods first parameter signature will be `string` in 2.0.0.
+- `\Art4\JsonApiClient\Factory::make()` will add `\Art4\JsonApiClient\Accessable` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
+- `\Art4\JsonApiClient\Input\Input::getAsObject()` will add `\stdClass` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
+- `\Art4\JsonApiClient\Manager::parse()` will add `\Art4\JsonApiClient\Accessable` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
+- `\Art4\JsonApiClient\Manager::getFactory()` will add `\Art4\JsonApiClient\Factory` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
+- `\Art4\JsonApiClient\Manager::getParam()` methods first parameter signature will be `string` in 2.0.0.
+- `\Art4\JsonApiClient\Serializer\Serializer::serialize()` will add `?array` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
 
 ## [1.0.0 - 2021-03-05](https://github.com/Art4/json-api-client/compare/0.10.2...1.0.0)
 
diff --git a/src/Accessable.php b/src/Accessable.php
index 8df8d91..11f3c93 100644
--- a/src/Accessable.php
+++ b/src/Accessable.php
@@ -27,7 +27,7 @@ public function get($key);
     /**
      * Check if a value exists
      *
-     * @return-type-will-change bool `\Art4\JsonApiClient\Accessable::has()` will add `bool` as a native return type declaration in v2.0. Do the same in your implementation now to avoid errors.
+     * @return-type-will-change bool `\Art4\JsonApiClient\Accessable::has()` will add `bool` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
      *
      * @param mixed $key The key
      *
@@ -38,7 +38,7 @@ public function has($key)/*: bool */;
     /**
      * Returns the keys of all setted values
      *
-     * @return-type-will-change array `\Art4\JsonApiClient\Accessable::getKeys()` will add `array` as a native return type declaration in v2.0. Do the same in your implementation now to avoid errors.
+     * @return-type-will-change array `\Art4\JsonApiClient\Accessable::getKeys()` will add `array` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
      *
      * @return array<string|int> Keys of all setted values
      */
diff --git a/src/Exception/Exception.php b/src/Exception/Exception.php
index 87f6be5..ffdeb7c 100644
--- a/src/Exception/Exception.php
+++ b/src/Exception/Exception.php
@@ -9,7 +9,7 @@
 namespace Art4\JsonApiClient\Exception;
 
 /**
- * Please note: `\Art4\JsonApiClient\Exception\Exception` will extend `\Throwable` in v2.0. Do the same in your implementation now to avoid errors.
+ * Please note: `\Art4\JsonApiClient\Exception\Exception` will extend `\Throwable` in 2.0.0, do the same in your implementation now to avoid errors.
  */
 interface Exception /*extends \Throwable */
 {}
diff --git a/src/Factory.php b/src/Factory.php
index c3fa021..d25a5c1 100644
--- a/src/Factory.php
+++ b/src/Factory.php
@@ -16,7 +16,7 @@ interface Factory
     /**
      * Create a new instance of a class
      *
-     * @return-type-will-change Accessable `\Art4\JsonApiClient\Factory::make()` will add `\Art4\JsonApiClient\Accessable` as a native return type declaration in v2.0. Do the same in your implementation now to avoid errors.
+     * @return-type-will-change Accessable `\Art4\JsonApiClient\Factory::make()` will add `\Art4\JsonApiClient\Accessable` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
      *
      * @param array<mixed|Manager|Accessable> $args
      *
diff --git a/src/Helper/AccessableTrait.php b/src/Helper/AccessableTrait.php
index 95a78af..4a6a6ce 100644
--- a/src/Helper/AccessableTrait.php
+++ b/src/Helper/AccessableTrait.php
@@ -57,10 +57,9 @@ final public function has($key): bool
     {
         if (! is_int($key) && ! is_string($key) && (! is_object($key) || ! $key instanceof AccessKey)) {
             trigger_error(sprintf(
-                '%s::has(): Providing Argument #1 ($key) as %s is deprecated since 1.2.0, please provide as int|string|%s instead.',
+                '%s::has(): Providing Argument #1 ($key) as `%s` is deprecated since 1.2.0, please provide as `int|string` instead.',
                 get_class($this),
-                gettype($key),
-                AccessKey::class
+                gettype($key)
             ), \E_USER_DEPRECATED);
 
             $key = '';
@@ -101,10 +100,9 @@ public function get($key)
     {
         if (! is_int($key) && ! is_string($key) && (! is_object($key) || ! $key instanceof AccessKey)) {
             trigger_error(sprintf(
-                '%s::get(): Providing Argument #1 ($key) as %s is deprecated since 1.2.0, please provide as int|string|%s instead.',
+                '%s::get(): Providing Argument #1 ($key) as `%s` is deprecated since 1.2.0, please provide as `int|string` instead.',
                 get_class($this),
-                gettype($key),
-                AccessKey::class
+                gettype($key)
             ), \E_USER_DEPRECATED);
 
             $key = '';
diff --git a/src/Input/Input.php b/src/Input/Input.php
index 163b53a..bb168c4 100644
--- a/src/Input/Input.php
+++ b/src/Input/Input.php
@@ -16,7 +16,7 @@ interface Input
     /**
      * Get the input as simple object
      *
-     * @return-type-will-change \stdClass `\Art4\JsonApiClient\Input\Input::getAsObject()` will add `\stdClass` as a native return type declaration in v2.0. Do the same in your implementation now to avoid errors.
+     * @return-type-will-change \stdClass `\Art4\JsonApiClient\Input\Input::getAsObject()` will add `\stdClass` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
      *
      * This should be a native PHP stdClass object, so Manager could
      * iterate over all public attributes
diff --git a/src/Manager.php b/src/Manager.php
index b9df215..0610da0 100644
--- a/src/Manager.php
+++ b/src/Manager.php
@@ -18,7 +18,7 @@ interface Manager
     /**
      * Parse the input
      *
-     * @return-type-will-change Accessable `\Art4\JsonApiClient\Manager::parse()` will add `\Art4\JsonApiClient\Accessable` as a native return type declaration in v2.0. Do the same in your implementation now to avoid errors.
+     * @return-type-will-change Accessable `\Art4\JsonApiClient\Manager::parse()` will add `\Art4\JsonApiClient\Accessable` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
      *
      * @throws \Art4\JsonApiClient\Exception\InputException If $input contains invalid JSON API
      * @throws \Art4\JsonApiClient\Exception\ValidationException If $input contains invalid JSON API
@@ -30,7 +30,7 @@ public function parse(Input $input)/*: Accessable */;
     /**
      * Get a factory from the manager
      *
-     * @return-type-will-change Factory `\Art4\JsonApiClient\Manager::getFactory()` will add `\Art4\JsonApiClient\Factory` as a native return type declaration in v2.0. Do the same in your implementation now to avoid errors.
+     * @return-type-will-change Factory `\Art4\JsonApiClient\Manager::getFactory()` will add `\Art4\JsonApiClient\Factory` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
      *
      * @return \Art4\JsonApiClient\Factory
      */
diff --git a/src/Serializer/Serializer.php b/src/Serializer/Serializer.php
index f6a4324..3801cbd 100644
--- a/src/Serializer/Serializer.php
+++ b/src/Serializer/Serializer.php
@@ -15,7 +15,7 @@ interface Serializer
     /**
      * Serialize data
      *
-     * @return-type-will-change ?array `\Art4\JsonApiClient\Serializer\Serializer::serialize()` will add `?array` as a native return type declaration in v2.0. Do the same in your implementation now to avoid errors.
+     * @return-type-will-change ?array `\Art4\JsonApiClient\Serializer\Serializer::serialize()` will add `?array` as a native return type declaration in 2.0.0, do the same in your implementation now to avoid errors.
      *
      * @return array<string, mixed>|null
      */
diff --git a/src/V1/ResourceNull.php b/src/V1/ResourceNull.php
index 935cf5a..d687293 100644
--- a/src/V1/ResourceNull.php
+++ b/src/V1/ResourceNull.php
@@ -39,10 +39,9 @@ public function has($key): bool
     {
         if (! is_int($key) && ! is_string($key) && (! is_object($key) || ! $key instanceof AccessKey)) {
             trigger_error(sprintf(
-                '%s::has(): Providing Argument #1 ($key) as %s is deprecated since 1.2.0, please provide as int|string|%s instead.',
+                '%s::has(): Providing Argument #1 ($key) as `%s` is deprecated since 1.2.0, please provide as `int|string` instead.',
                 get_class($this),
-                gettype($key),
-                AccessKey::class
+                gettype($key)
             ), \E_USER_DEPRECATED);
         }
 
diff --git a/tests/Unit/Helper/AccessableTraitTest.php b/tests/Unit/Helper/AccessableTraitTest.php
index 9953cf6..f52ef81 100644
--- a/tests/Unit/Helper/AccessableTraitTest.php
+++ b/tests/Unit/Helper/AccessableTraitTest.php
@@ -30,7 +30,7 @@ public function testHasWithInvalidKeyTypeTriggersDeprecationError($key): void
         set_error_handler(
             function ($errno, $errstr) use ($key): bool {
                 $this->assertSame(
-                    'Art4\JsonApiClient\Tests\Fixtures\AccessableTraitMock::has(): Providing Argument #1 ($key) as ' . gettype($key) . ' is deprecated since 1.2.0, please provide as int|string|Art4\JsonApiClient\Helper\AccessKey instead.',
+                    'Art4\JsonApiClient\Tests\Fixtures\AccessableTraitMock::has(): Providing Argument #1 ($key) as `' . gettype($key) . '` is deprecated since 1.2.0, please provide as `int|string` instead.',
                     $errstr
                 );
 
@@ -56,7 +56,7 @@ public function testGetWithInvalidKeyTypeTriggersDeprecationError($key): void
         set_error_handler(
             function ($errno, $errstr) use ($key): bool {
                 $this->assertSame(
-                    'Art4\JsonApiClient\Tests\Fixtures\AccessableTraitMock::get(): Providing Argument #1 ($key) as ' . gettype($key) . ' is deprecated since 1.2.0, please provide as int|string|Art4\JsonApiClient\Helper\AccessKey instead.',
+                    'Art4\JsonApiClient\Tests\Fixtures\AccessableTraitMock::get(): Providing Argument #1 ($key) as `' . gettype($key) . '` is deprecated since 1.2.0, please provide as `int|string` instead.',
                     $errstr
                 );
 
diff --git a/tests/Unit/V1/ResourceNullTest.php b/tests/Unit/V1/ResourceNullTest.php
index b59c69e..b476e3d 100644
--- a/tests/Unit/V1/ResourceNullTest.php
+++ b/tests/Unit/V1/ResourceNullTest.php
@@ -77,7 +77,7 @@ public function testHasWithObjectAsKeyTriggersException(): void
         set_error_handler(
             function ($errno, $errstr): bool {
                 $this->assertSame(
-                    'Art4\JsonApiClient\V1\ResourceNull::has(): Providing Argument #1 ($key) as object is deprecated since 1.2.0, please provide as int|string|Art4\JsonApiClient\Helper\AccessKey instead.',
+                    'Art4\JsonApiClient\V1\ResourceNull::has(): Providing Argument #1 ($key) as `object` is deprecated since 1.2.0, please provide as `int|string` instead.',
                     $errstr
                 );
 
@@ -102,7 +102,7 @@ public function testHasWithArrayAsKeyTriggersException(): void
         set_error_handler(
             function ($errno, $errstr): bool {
                 $this->assertSame(
-                    'Art4\JsonApiClient\V1\ResourceNull::has(): Providing Argument #1 ($key) as array is deprecated since 1.2.0, please provide as int|string|Art4\JsonApiClient\Helper\AccessKey instead.',
+                    'Art4\JsonApiClient\V1\ResourceNull::has(): Providing Argument #1 ($key) as `array` is deprecated since 1.2.0, please provide as `int|string` instead.',
                     $errstr
                 );