diff --git a/composer.lock b/composer.lock
index a800dea..17ab6fa 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1200,16 +1200,16 @@
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@@ -1252,20 +1252,20 @@
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-            "time": "2016-09-06 23:30:54"
+            "time": "2016-11-15 12:07:16"
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@@ -1313,20 +1313,20 @@
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+            "time": "2016-11-16 22:17:09"
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-            "version": "v3.1.6",
+            "version": "v3.1.7",
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@@ -1370,20 +1370,20 @@
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-            "time": "2016-09-06 11:02:40"
+            "time": "2016-11-15 12:55:20"
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-            "version": "v3.1.6",
+            "version": "v3.1.7",
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                 "url": "https://github.com/symfony/dependency-injection.git",
-                "reference": "c578891216090069cd6d2e573402e13e39b3ad5c"
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@@ -1430,20 +1430,20 @@
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+            "time": "2016-11-18 21:15:08"
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-            "version": "v3.1.6",
+            "version": "v3.1.7",
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@@ -1486,11 +1486,11 @@
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-            "time": "2016-10-18 15:46:07"
+            "time": "2016-11-14 16:20:02"
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@@ -1550,16 +1550,16 @@
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+            "version": "v3.1.7",
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@@ -1599,20 +1599,20 @@
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-            "time": "2016-10-24 15:52:44"
+            "time": "2016-11-16 22:17:09"
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-            "version": "v3.1.6",
+            "version": "v3.1.7",
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                 "url": "https://github.com/symfony/http-kernel.git",
-                "reference": "c235f1b13ba67012e283996a5427f22e2e04be14"
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-                "reference": "c235f1b13ba67012e283996a5427f22e2e04be14",
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@@ -1681,20 +1681,20 @@
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             "homepage": "https://symfony.com",
-            "time": "2016-10-27 02:38:31"
+            "time": "2016-11-21 02:44:20"
         },
         {
             "name": "symfony/polyfill-iconv",
-            "version": "v1.2.0",
+            "version": "v1.3.0",
             "source": {
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                 "url": "https://github.com/symfony/polyfill-iconv.git",
-                "reference": "b287e8554b1ffd9b5b20b5df940d906930ff4a10"
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@@ -1706,7 +1706,7 @@
             "type": "library",
             "extra": {
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-                    "dev-master": "1.2-dev"
+                    "dev-master": "1.3-dev"
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@@ -1740,20 +1740,20 @@
                 "portable",
                 "shim"
             ],
-            "time": "2016-05-18 14:26:46"
+            "time": "2016-11-14 01:06:16"
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.2.0",
+            "version": "v1.3.0",
             "source": {
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                 "url": "https://github.com/symfony/polyfill-mbstring.git",
-                "reference": "dff51f72b0706335131b00a7f49606168c582594"
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-                "reference": "dff51f72b0706335131b00a7f49606168c582594",
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@@ -1765,7 +1765,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.2-dev"
+                    "dev-master": "1.3-dev"
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@@ -1799,11 +1799,11 @@
                 "portable",
                 "shim"
             ],
-            "time": "2016-05-18 14:26:46"
+            "time": "2016-11-14 01:06:16"
         },
         {
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-            "version": "v3.1.6",
+            "version": "v3.1.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
@@ -1906,7 +1906,7 @@
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         {
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-            "version": "v3.1.6",
+            "version": "v3.1.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/routing.git",
@@ -1981,16 +1981,16 @@
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         {
             "name": "symfony/serializer",
-            "version": "v3.1.6",
+            "version": "v3.1.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/serializer.git",
-                "reference": "2d2b0866397b870e307ca5f9923c89b1c8c25a42"
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@@ -2050,20 +2050,20 @@
             ],
             "description": "Symfony Serializer Component",
             "homepage": "https://symfony.com",
-            "time": "2016-10-07 16:40:45"
+            "time": "2016-11-15 07:36:22"
         },
         {
             "name": "symfony/translation",
-            "version": "v3.1.6",
+            "version": "v3.1.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/translation.git",
-                "reference": "ff1285087397d2f64041b35e591f3025881c90cd"
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-                "reference": "ff1285087397d2f64041b35e591f3025881c90cd",
+                "url": "https://api.github.com/repos/symfony/translation/zipball/2f4b6114b75c506dd1ee7eb485b35facbcb2d873",
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             "require": {
@@ -2114,20 +2114,20 @@
             ],
             "description": "Symfony Translation Component",
             "homepage": "https://symfony.com",
-            "time": "2016-10-18 04:30:12"
+            "time": "2016-11-18 21:15:08"
         },
         {
             "name": "symfony/validator",
-            "version": "v3.1.6",
+            "version": "v3.1.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/validator.git",
-                "reference": "709dffa9193ee2b88e1fb1760cc0ba5780f1a8b2"
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@@ -2188,20 +2188,20 @@
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             "homepage": "https://symfony.com",
-            "time": "2016-10-19 22:38:53"
+            "time": "2016-11-18 21:15:08"
         },
         {
             "name": "symfony/yaml",
-            "version": "v3.1.6",
+            "version": "v3.1.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "7ff51b06c6c3d5cc6686df69004a42c69df09e27"
+                "reference": "9da375317228e54f4ea1b013b30fa47417e84943"
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-                "reference": "7ff51b06c6c3d5cc6686df69004a42c69df09e27",
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@@ -2237,7 +2237,7 @@
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             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2016-10-24 18:41:13"
+            "time": "2016-11-18 21:05:29"
         },
         {
             "name": "twig/twig",
@@ -3904,7 +3904,7 @@
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         {
             "name": "symfony/browser-kit",
-            "version": "v3.1.6",
+            "version": "v3.1.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/browser-kit.git",
@@ -3961,16 +3961,16 @@
         },
         {
             "name": "symfony/css-selector",
-            "version": "v3.1.6",
+            "version": "v3.1.7",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/css-selector.git",
-                "reference": "ca809c64072e0fe61c1c7fb3c76cdc32265042ac"
+                "reference": "a37b3359566415a91cba55a2d95820b3fa1a9658"
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@@ -4010,7 +4010,7 @@
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             "description": "Symfony CssSelector Component",
             "homepage": "https://symfony.com",
-            "time": "2016-09-06 11:02:40"
+            "time": "2016-11-03 08:04:31"
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diff --git a/core/composer.json b/core/composer.json
index 7d8ddcf..4d9024d 100644
--- a/core/composer.json
+++ b/core/composer.json
@@ -10,7 +10,7 @@
         "symfony/dependency-injection": "~3.1",
         "symfony/dom-crawler": ">=3.1.6 <4.0",
         "symfony/event-dispatcher": "~3.1",
-        "symfony/http-foundation": "~3.1",
+        "symfony/http-foundation": ">=3.1.6 <4.0",
         "symfony/http-kernel": "~3.1",
         "symfony/routing": "~3.1",
         "symfony/serializer": "~3.1",
diff --git a/core/lib/Drupal/Core/PageCache/RequestPolicy/CommandLineOrUnsafeMethod.php b/core/lib/Drupal/Core/PageCache/RequestPolicy/CommandLineOrUnsafeMethod.php
index bbf85a3..27a1f71 100644
--- a/core/lib/Drupal/Core/PageCache/RequestPolicy/CommandLineOrUnsafeMethod.php
+++ b/core/lib/Drupal/Core/PageCache/RequestPolicy/CommandLineOrUnsafeMethod.php
@@ -18,7 +18,7 @@ class CommandLineOrUnsafeMethod implements RequestPolicyInterface {
    * {@inheritdoc}
    */
   public function check(Request $request) {
-    if ($this->isCli() || !$request->isMethodSafe()) {
+    if ($this->isCli() || !$request->isMethodCacheable()) {
       return static::DENY;
     }
   }