diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8fc837b..e89faf7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,24 @@
 ## Unreleased
 - Add schema validation: Input Objects must not contain non-nullable circular references (#492)
 
+#### v0.13.5
+- Fix coroutine executor when using with promise (#486) 
+
+#### v0.13.4
+- Force int when setting max query depth (#477)
+
+#### v0.13.3
+- Reverted minor possible breaking change (#476)
+
+#### v0.13.2
+- Added QueryPlan support (#436)
+- Fixed an issue with NodeList iteration over missing keys (#475)
+
+#### v0.13.1
+- Better validation of field/directive arguments
+- Support for apollo client/server persisted queries
+- Minor tweaks and fixes
+
 ## v0.13.0
 This release brings several breaking changes. Please refer to [UPGRADE](UPGRADE.md) document for details.
 
diff --git a/docs/index.md b/docs/index.md
index 92a354e..a031a42 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -44,8 +44,8 @@ existing PHP frameworks, add support for Relay, etc.
 ## Current Status
 The first version of this library (v0.1) was released on August 10th 2015.
 
-The current version (v0.10) supports all features described by GraphQL specification 
-(including April 2016 add-ons) as well as some experimental features like 
+The current version supports all features described by GraphQL specification 
+as well as some experimental features like 
 [Schema Language parser](type-system/type-language.md) and 
 [Schema printer](reference.md#graphqlutilsschemaprinter).
 
diff --git a/src/Experimental/Executor/CoroutineExecutor.php b/src/Experimental/Executor/CoroutineExecutor.php
index d985633..91091b4 100644
--- a/src/Experimental/Executor/CoroutineExecutor.php
+++ b/src/Experimental/Executor/CoroutineExecutor.php
@@ -293,13 +293,17 @@ class CoroutineExecutor implements Runtime, ExecutorImplementation
                         $strand->stack[$strand->depth++] = $strand->current;
                         $strand->current                 = $value;
                         goto START;
-                    } elseif ($this->promiseAdapter->isThenable($value)) {
+                    } elseif ($this->isPromise($value)) {
                         // !!! increment pending before calling ->then() as it may invoke the callback right away
                         ++$this->pending;
 
+                        if (! $value instanceof Promise) {
+                            $value = $this->promiseAdapter->convertThenable($value);
+                        }
+
                         $this->promiseAdapter
-                            ->convertThenable($value)
                             ->then(
+                                $value,
                                 function ($value) use ($strand) {
                                     $strand->success = true;
                                     $strand->value   = $value;
@@ -478,7 +482,7 @@ class CoroutineExecutor implements Runtime, ExecutorImplementation
     private function completeValueFast(CoroutineContext $ctx, Type $type, $value, array $path, &$returnValue) : bool
     {
         // special handling of Throwable inherited from JS reference implementation, but makes no sense in this PHP
-        if ($this->promiseAdapter->isThenable($value) || $value instanceof Throwable) {
+        if ($this->isPromise($value) || $value instanceof Throwable) {
             return false;
         }
 
@@ -574,7 +578,7 @@ class CoroutineExecutor implements Runtime, ExecutorImplementation
 
         // !!! $value might be promise, yield to resolve
         try {
-            if ($this->promiseAdapter->isThenable($value)) {
+            if ($this->isPromise($value)) {
                 $value = yield $value;
             }
         } catch (Throwable $reason) {
@@ -931,4 +935,14 @@ class CoroutineExecutor implements Runtime, ExecutorImplementation
 
         return $selectedType;
     }
+
+    /**
+     * @param mixed $value
+     *
+     * @return bool
+     */
+    private function isPromise($value)
+    {
+        return $value instanceof Promise || $this->promiseAdapter->isThenable($value);
+    }
 }
diff --git a/src/Validator/Rules/QueryDepth.php b/src/Validator/Rules/QueryDepth.php
index c2fe7b0..cb01dd2 100644
--- a/src/Validator/Rules/QueryDepth.php
+++ b/src/Validator/Rules/QueryDepth.php
@@ -99,11 +99,11 @@ class QueryDepth extends QuerySecurityRule
     /**
      * Set max query depth. If equal to 0 no check is done. Must be greater or equal to 0.
      */
-    public function setMaxQueryDepth(int $maxQueryDepth)
+    public function setMaxQueryDepth($maxQueryDepth)
     {
         $this->checkIfGreaterOrEqualToZero('maxQueryDepth', $maxQueryDepth);
 
-        $this->maxQueryDepth = $maxQueryDepth;
+        $this->maxQueryDepth = (int) $maxQueryDepth;
     }
 
     public static function maxQueryDepthErrorMessage($max, $count)
diff --git a/tests/GraphQLTest.php b/tests/GraphQLTest.php
new file mode 100644
index 0000000..13193b5
--- /dev/null
+++ b/tests/GraphQLTest.php
@@ -0,0 +1,47 @@
+<?php
+
+declare(strict_types=1);
+
+namespace GraphQL\Tests;
+
+use GraphQL\Executor\Promise\Adapter\SyncPromiseAdapter;
+use GraphQL\GraphQL;
+use GraphQL\Type\Definition\ObjectType;
+use GraphQL\Type\Definition\Type;
+use GraphQL\Type\Schema;
+use PHPUnit\Framework\TestCase;
+use function sprintf;
+
+class GraphQLTest extends TestCase
+{
+    public function testPromiseToExecute() : void
+    {
+        $promiseAdapter = new SyncPromiseAdapter();
+        $schema         = new Schema(
+            [
+                'query' => new ObjectType(
+                    [
+                        'name' => 'Query',
+                        'fields' => [
+                            'sayHi' => [
+                                'type' => Type::nonNull(Type::string()),
+                                'args' => [
+                                    'name' => [
+                                        'type' => Type::nonNull(Type::string()),
+                                    ],
+                                ],
+                                'resolve' => static function ($value, $args) use ($promiseAdapter) {
+                                    return $promiseAdapter->createFulfilled(sprintf('Hi %s!', $args['name']));
+                                },
+                            ],
+                        ],
+                    ]
+                ),
+            ]
+        );
+
+        $promise = GraphQL::promiseToExecute($promiseAdapter, $schema, '{ sayHi(name: "John") }');
+        $result  = $promiseAdapter->wait($promise);
+        self::assertSame(['data' => ['sayHi' => 'Hi John!']], $result->toArray());
+    }
+}