diff --git a/composer.lock b/composer.lock
index 835ea153ac..ddaa66ee82 100644
--- a/composer.lock
+++ b/composer.lock
@@ -2257,35 +2257,38 @@
         },
         {
             "name": "twig/twig",
-            "version": "v1.32.0",
+            "version": "v1.35.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/twigphp/Twig.git",
-                "reference": "9935b662e24d6e634da88901ab534cc12e8c728f"
+                "reference": "daa657073e55b0a78cce8fdd22682fddecc6385f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/twigphp/Twig/zipball/9935b662e24d6e634da88901ab534cc12e8c728f",
-                "reference": "9935b662e24d6e634da88901ab534cc12e8c728f",
+                "url": "https://api.github.com/repos/twigphp/Twig/zipball/daa657073e55b0a78cce8fdd22682fddecc6385f",
+                "reference": "daa657073e55b0a78cce8fdd22682fddecc6385f",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.2.7"
+                "php": ">=5.3.3"
             },
             "require-dev": {
                 "psr/container": "^1.0",
                 "symfony/debug": "~2.7",
-                "symfony/phpunit-bridge": "~3.2"
+                "symfony/phpunit-bridge": "~3.3@dev"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.32-dev"
+                    "dev-master": "1.35-dev"
                 }
             },
             "autoload": {
                 "psr-0": {
                     "Twig_": "lib/"
+                },
+                "psr-4": {
+                    "Twig\\": "src/"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -2315,7 +2318,7 @@
             "keywords": [
                 "templating"
             ],
-            "time": "2017-02-27T00:07:03+00:00"
+            "time": "2017-09-27T18:06:46+00:00"
         },
         {
             "name": "wikimedia/composer-merge-plugin",
diff --git a/core/composer.json b/core/composer.json
index bda527f99d..c802e5d6ee 100644
--- a/core/composer.json
+++ b/core/composer.json
@@ -18,7 +18,7 @@
         "symfony/process": "~3.2.8",
         "symfony/polyfill-iconv": "^1.0",
         "symfony/yaml": "~3.2.8",
-        "twig/twig": "^1.23.1",
+        "twig/twig": "^1.35.0",
         "doctrine/common": "^2.5",
         "doctrine/annotations": "^1.2",
         "guzzlehttp/guzzle": "^6.2.1",
diff --git a/core/tests/Drupal/KernelTests/Core/Theme/TwigMarkupInterfaceTest.php b/core/tests/Drupal/KernelTests/Core/Theme/TwigMarkupInterfaceTest.php
index d30d2de13d..dbdf351a71 100644
--- a/core/tests/Drupal/KernelTests/Core/Theme/TwigMarkupInterfaceTest.php
+++ b/core/tests/Drupal/KernelTests/Core/Theme/TwigMarkupInterfaceTest.php
@@ -57,7 +57,7 @@ public function providerTestMarkupInterfaceEmpty() {
       'empty GeneratedLink' => ['', new GeneratedLink()],
       'non-empty GeneratedLink' => ['<span><a hef="http://www.example.com">test</a></span>', (new GeneratedLink())->setGeneratedLink('<a hef="http://www.example.com">test</a>')],
       // Test objects that do not implement \Countable.
-      'empty SafeMarkupTestMarkup' => ['<span></span>', SafeMarkupTestMarkup::create('')],
+      'empty SafeMarkupTestMarkup' => ['', SafeMarkupTestMarkup::create('')],
       'non-empty SafeMarkupTestMarkup' => ['<span>test</span>', SafeMarkupTestMarkup::create('test')],
     ];
   }