diff --git a/Makefile b/Makefile
index a8a6b51..763adce 100644
--- a/Makefile
+++ b/Makefile
@@ -15,6 +15,11 @@ setup: install-phive
 phpcs:
 	docker run -it --rm -v${PWD}:/opt/project -w /opt/project phpdoc/phpcs-ga:latest -s
 
+.PHONY: phpcbf
+phpcbf:
+	docker run -it --rm -v${PWD}:/opt/project -w /opt/project phpdoc/phpcs-ga:latest phpcbf
+
+
 .PHONY: phpstan
 phpstan:
 	docker run -it --rm -v${PWD}:/opt/project -w /opt/project phpdoc/phpstan-ga:latest analyse src --no-progress --configuration phpstan.neon
diff --git a/src/TypeResolver.php b/src/TypeResolver.php
index ce81a67..62edeca 100644
--- a/src/TypeResolver.php
+++ b/src/TypeResolver.php
@@ -87,8 +87,8 @@ final class TypeResolver
         'scalar' => Types\Scalar::class,
         'callback' => Types\Callable_::class,
         'callable' => Types\Callable_::class,
-        'false' => Types\Boolean::class,
-        'true' => Types\Boolean::class,
+        'false' => Types\False_::class,
+        'true' => Types\True_::class,
         'self' => Types\Self_::class,
         '$this' => Types\This::class,
         'static' => Types\Static_::class,
diff --git a/src/Types/Boolean.php b/src/Types/Boolean.php
index afeccba..9163b51 100644
--- a/src/Types/Boolean.php
+++ b/src/Types/Boolean.php
@@ -20,7 +20,7 @@
  *
  * @psalm-immutable
  */
-final class Boolean implements Type
+class Boolean implements Type
 {
     /**
      * Returns a rendered output of the Type as it would be used in a DocBlock.
diff --git a/src/Types/False_.php b/src/Types/False_.php
new file mode 100644
index 0000000..39666fb
--- /dev/null
+++ b/src/Types/False_.php
@@ -0,0 +1,29 @@
+<?php
+/**
+ * This file is part of phpDocumentor.
+ *
+ *  For the full copyright and license information, please view the LICENSE
+ *  file that was distributed with this source code.
+ *
+ *  @link      http://phpdoc.org
+ */
+
+declare(strict_types=1);
+
+namespace phpDocumentor\Reflection\Types;
+
+/**
+ * Value Object representing a False pseudo type.
+ *
+ * @psalm-immutable
+ */
+class False_ extends Boolean
+{
+    /**
+     * Returns a rendered output of the Type as it would be used in a DocBlock.
+     */
+    public function __toString() : string
+    {
+        return 'false';
+    }
+}
diff --git a/src/Types/True_.php b/src/Types/True_.php
new file mode 100644
index 0000000..3d00e66
--- /dev/null
+++ b/src/Types/True_.php
@@ -0,0 +1,29 @@
+<?php
+/**
+ * This file is part of phpDocumentor.
+ *
+ *  For the full copyright and license information, please view the LICENSE
+ *  file that was distributed with this source code.
+ *
+ *  @link      http://phpdoc.org
+ */
+
+declare(strict_types=1);
+
+namespace phpDocumentor\Reflection\Types;
+
+/**
+ * Value Object representing a True pseudo type.
+ *
+ * @psalm-immutable
+ */
+class True_ extends Boolean
+{
+    /**
+     * Returns a rendered output of the Type as it would be used in a DocBlock.
+     */
+    public function __toString() : string
+    {
+        return 'true';
+    }
+}
diff --git a/tests/unit/TypeResolverTest.php b/tests/unit/TypeResolverTest.php
index b293c2e..83de79b 100644
--- a/tests/unit/TypeResolverTest.php
+++ b/tests/unit/TypeResolverTest.php
@@ -712,6 +712,10 @@ public function provideKeywords() : array
             ['double', Types\Float_::class],
             ['bool', Types\Boolean::class],
             ['boolean', Types\Boolean::class],
+            ['true', Types\Boolean::class],
+            ['true', Types\True_::class],
+            ['false', Types\Boolean::class],
+            ['false', Types\False_::class],
             ['resource', Types\Resource_::class],
             ['null', Types\Null_::class],
             ['callable', Types\Callable_::class],