diff --git a/example/simple_query.php b/example/simple_query.php
index 7f01e1e..fef172f 100644
--- a/example/simple_query.php
+++ b/example/simple_query.php
@@ -9,25 +9,25 @@
 
 require __DIR__ . '/../vendor/autoload.php';
 
-    run(function ($loop) use ($genFn) {
-        // Logger to show pretty messages with timestamps.
-        $logger = new Logger('default');
-        $logger->pushHandler(new StreamHandler('php://stdout', Logger::INFO));
+run(function ($loop) use ($genFn) {
+    // Logger to show pretty messages with timestamps.
+    $logger = new Logger('default');
+    $logger->pushHandler(new StreamHandler('php://stdout', Logger::INFO));
 
-        $httpHandler = new CurlMultiHandler($loop);
-        $stack = HandlerStack::create($httpHandler);
+    $httpHandler = new CurlMultiHandler($loop);
+    $stack = HandlerStack::create($httpHandler);
 
-        $httpClient = new Client([
-            'handler' => $stack,
-        ]);
+    $httpClient = new Client([
+        'handler' => $stack,
+    ]);
 
-        $promise = $httpClient->getAsync('https://google.com')->then(
-            function ($result) use ($logger) { $logger->info('Query completed!'); },
-            function ($reason) use ($logger) { $logger->error('Query failed :('); }
-        );
+    $promise = $httpClient->getAsync('https://google.com')->then(
+        function ($result) use ($logger) { $logger->info('Query completed!'); },
+        function ($reason) use ($logger) { $logger->error('Query failed :('); }
+    );
 
-        /*
-         * The promise isn't completed yet, but it will be resolved in the future, the event loop will take care of it.
-         * We don't need to call Promise::wait()!
-         */
-    });
+    /*
+     * The promise isn't completed yet, but it will be resolved in the future, the event loop will take care of it.
+     * We don't need to call Promise::wait()!
+     */
+});
diff --git a/example/throttle_coroutine.php b/example/throttle_coroutine.php
index e3e2cbc..1c0278b 100644
--- a/example/throttle_coroutine.php
+++ b/example/throttle_coroutine.php
@@ -51,4 +51,6 @@ function ($reason) use ($logger) { $logger->error('Query failed :('); }
 
     // This will done only after the completion of all calls in each_limit().
     echo 'Done!';
+
+    return 0;
 });