diff --git a/composer.lock b/composer.lock
index 362a4822..e18d4593 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
         "This file is @generated automatically"
     ],
-    "content-hash": "55e9b96dad758987b3fd56ee9bf2e1fd",
+    "content-hash": "d55a659c246edf8300e41e8cd75301e5",
     "packages": [
         {
             "name": "doctrine/annotations",
@@ -151,34 +151,36 @@
         },
         {
             "name": "doctrine/collections",
-            "version": "v1.5.0",
+            "version": "v1.6.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/collections.git",
-                "reference": "a01ee38fcd999f34d9bfbcee59dbda5105449cbf"
+                "reference": "acc35813077be497dc7f658af76729fa456444e3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/collections/zipball/a01ee38fcd999f34d9bfbcee59dbda5105449cbf",
-                "reference": "a01ee38fcd999f34d9bfbcee59dbda5105449cbf",
+                "url": "https://api.github.com/repos/doctrine/collections/zipball/acc35813077be497dc7f658af76729fa456444e3",
+                "reference": "acc35813077be497dc7f658af76729fa456444e3",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.1"
+                "php": "^7.1.3"
             },
             "require-dev": {
-                "doctrine/coding-standard": "~0.1@dev",
-                "phpunit/phpunit": "^5.7"
+                "doctrine/coding-standard": "^6.0",
+                "phpstan/phpstan-shim": "^0.9.2",
+                "phpunit/phpunit": "^7.0",
+                "vimeo/psalm": "^3.2.2"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.3.x-dev"
+                    "dev-master": "1.6.x-dev"
                 }
             },
             "autoload": {
-                "psr-0": {
-                    "Doctrine\\Common\\Collections\\": "lib/"
+                "psr-4": {
+                    "Doctrine\\Common\\Collections\\": "lib/Doctrine/Common/Collections"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -207,14 +209,15 @@
                     "email": "schmittjoh@gmail.com"
                 }
             ],
-            "description": "Collections Abstraction library",
-            "homepage": "http://www.doctrine-project.org",
+            "description": "PHP Doctrine Collections library that adds additional functionality on top of PHP arrays.",
+            "homepage": "https://www.doctrine-project.org/projects/collections.html",
             "keywords": [
                 "array",
                 "collections",
-                "iterator"
+                "iterators",
+                "php"
             ],
-            "time": "2017-07-22T10:37:32+00:00"
+            "time": "2019-03-24T18:21:39+00:00"
         },
         {
             "name": "doctrine/common",
@@ -7056,7 +7059,8 @@
     "platform": {
         "php": "^7.1.3",
         "ext-ctype": "*",
-        "ext-iconv": "*"
+        "ext-iconv": "*",
+        "ext-mbstring": "*"
     },
     "platform-dev": []
 }