diff --git a/composer.json b/composer.json
index d9986bd..89b1ecd 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
     "require"    : {
         "php"                : ">=5.5.0",
         "ext-mbstring"       : "*",
-        "phpoption/phpoption": "1.4.*",
+        "phpoption/phpoption": "1.5.*",
         "symfony/console"    : "2.*"
     },
     "require-dev": {
diff --git a/composer.lock b/composer.lock
index 41afd88..13eb45c 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,26 +4,29 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
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-    "content-hash": "62bb55f055d0ff8668d29d3fd86d537d",
+    "hash": "c0a6d58662942a2f7464ccdb84f61d68",
+    "content-hash": "a4878cf37ed6f1f4dc8ad29d3af6c32a",
     "packages": [
         {
             "name": "phpoption/phpoption",
-            "version": "1.4.0",
+            "version": "1.5.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/schmittjoh/php-option.git",
-                "reference": "5d099bcf0393908bf4ad69cc47dafb785d51f7f5"
+                "reference": "94e644f7d2051a5f0fcf77d81605f152eecff0ed"
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-                "url": "https://api.github.com/repos/schmittjoh/php-option/zipball/5d099bcf0393908bf4ad69cc47dafb785d51f7f5",
-                "reference": "5d099bcf0393908bf4ad69cc47dafb785d51f7f5",
+                "url": "https://api.github.com/repos/schmittjoh/php-option/zipball/94e644f7d2051a5f0fcf77d81605f152eecff0ed",
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                 "shasum": ""
             },
             "require": {
                 "php": ">=5.3.0"
             },
+            "require-dev": {
+                "phpunit/phpunit": "4.7.*"
+            },
             "type": "library",
             "extra": {
                 "branch-alias": {
@@ -41,10 +44,8 @@
             ],
             "authors": [
                 {
-                    "name": "Johannes Schmitt",
-                    "email": "schmittjoh@gmail.com",
-                    "homepage": "https://github.com/schmittjoh",
-                    "role": "Developer of wrapped JMSSerializerBundle"
+                    "name": "Johannes M. Schmitt",
+                    "email": "schmittjoh@gmail.com"
                 }
             ],
             "description": "Option Type for PHP",
@@ -54,20 +55,20 @@
                 "php",
                 "type"
             ],
-            "time": "2014-01-09 22:37:17"
+            "time": "2015-07-25 16:39:46"
         },
         {
             "name": "symfony/console",
-            "version": "v2.8.3",
+            "version": "v2.8.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "56cc5caf051189720b8de974e4746090aaa10d44"
+                "reference": "48221d3de4dc22d2cd57c97e8b9361821da86609"
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-                "reference": "56cc5caf051189720b8de974e4746090aaa10d44",
+                "url": "https://api.github.com/repos/symfony/console/zipball/48221d3de4dc22d2cd57c97e8b9361821da86609",
+                "reference": "48221d3de4dc22d2cd57c97e8b9361821da86609",
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             "require": {
@@ -114,11 +115,11 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2016-02-28 16:20:50"
+            "time": "2016-04-26 12:00:47"
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.1.0",
+            "version": "v1.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
@@ -584,16 +585,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "4.8.23",
+            "version": "4.8.24",
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                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "6e351261f9cd33daf205a131a1ba61c6d33bd483"
+                "reference": "a1066c562c52900a142a0e2bbf0582994671385e"
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-                "reference": "6e351261f9cd33daf205a131a1ba61c6d33bd483",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/a1066c562c52900a142a0e2bbf0582994671385e",
+                "reference": "a1066c562c52900a142a0e2bbf0582994671385e",
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             "require": {
@@ -652,7 +653,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2016-02-11 14:56:33"
+            "time": "2016-03-14 06:16:08"
         },
         {
             "name": "phpunit/phpunit-mock-objects",
@@ -828,16 +829,16 @@
         },
         {
             "name": "sebastian/environment",
-            "version": "1.3.5",
+            "version": "1.3.6",
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                 "url": "https://github.com/sebastianbergmann/environment.git",
-                "reference": "dc7a29032cf72b54f36dac15a1ca5b3a1b6029bf"
+                "reference": "2292b116f43c272ff4328083096114f84ea46a56"
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-                "reference": "dc7a29032cf72b54f36dac15a1ca5b3a1b6029bf",
+                "url": "https://api.github.com/repos/sebastianbergmann/environment/zipball/2292b116f43c272ff4328083096114f84ea46a56",
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@@ -874,7 +875,7 @@
                 "environment",
                 "hhvm"
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-            "time": "2016-02-26 18:40:46"
+            "time": "2016-05-04 07:59:13"
         },
         {
             "name": "sebastian/exporter",
@@ -1083,16 +1084,16 @@
         },
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             "name": "symfony/yaml",
-            "version": "v3.0.3",
+            "version": "v3.0.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "b5ba64cd67ecd6887f63868fa781ca094bd1377c"
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-                "reference": "b5ba64cd67ecd6887f63868fa781ca094bd1377c",
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+                "reference": "0047c8366744a16de7516622c5b7355336afae96",
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             "require": {
@@ -1128,7 +1129,7 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2016-02-23 15:16:06"
+            "time": "2016-03-04 07:55:57"
         }
     ],
     "aliases": [],