diff --git a/composer.lock b/composer.lock
index 7d6abb2..99aa451 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,39 +1,40 @@
 {
     "_readme": [
         "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "8df6f0cfa35473fa87210a787ec03297",
+    "content-hash": "e0ebfb8ce427f5a854127b37e182fe34",
     "packages": [
         {
             "name": "guzzlehttp/psr7",
-            "version": "1.4.2",
+            "version": "1.5.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/guzzle/psr7.git",
-                "reference": "f5b8a8512e2b58b0071a7280e39f14f72e05d87c"
+                "reference": "9f83dded91781a01c63574e387eaa769be769115"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/guzzle/psr7/zipball/f5b8a8512e2b58b0071a7280e39f14f72e05d87c",
-                "reference": "f5b8a8512e2b58b0071a7280e39f14f72e05d87c",
+                "url": "https://api.github.com/repos/guzzle/psr7/zipball/9f83dded91781a01c63574e387eaa769be769115",
+                "reference": "9f83dded91781a01c63574e387eaa769be769115",
                 "shasum": ""
             },
             "require": {
                 "php": ">=5.4.0",
-                "psr/http-message": "~1.0"
+                "psr/http-message": "~1.0",
+                "ralouphie/getallheaders": "^2.0.5"
             },
             "provide": {
                 "psr/http-message-implementation": "1.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.0"
+                "phpunit/phpunit": "~4.8.36 || ^5.7.27 || ^6.5.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.4-dev"
+                    "dev-master": "1.5-dev"
                 }
             },
             "autoload": {
@@ -63,26 +64,27 @@
             "keywords": [
                 "http",
                 "message",
+                "psr-7",
                 "request",
                 "response",
                 "stream",
                 "uri",
                 "url"
             ],
-            "time": "2017-03-20T17:10:46+00:00"
+            "time": "2018-12-04T20:46:45+00:00"
         },
         {
             "name": "htmlburger/wpemerge",
-            "version": "0.11.0",
+            "version": "0.15.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/htmlburger/wpemerge.git",
-                "reference": "14853903f625f6e2699408ed81878f729d0bf733"
+                "reference": "954a98f26f3b73fb39f0794c301e29e67bc41554"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/htmlburger/wpemerge/zipball/14853903f625f6e2699408ed81878f729d0bf733",
-                "reference": "14853903f625f6e2699408ed81878f729d0bf733",
+                "url": "https://api.github.com/repos/htmlburger/wpemerge/zipball/954a98f26f3b73fb39f0794c301e29e67bc41554",
+                "reference": "954a98f26f3b73fb39f0794c301e29e67bc41554",
                 "shasum": ""
             },
             "require": {
@@ -141,7 +143,7 @@
                 "wordpress",
                 "wpemerge"
             ],
-            "time": "2018-10-27T19:44:23+00:00"
+            "time": "2019-06-02T11:51:21+00:00"
         },
         {
             "name": "pimple/pimple",