diff --git a/composer.lock b/composer.lock
index d99b837..d407568 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1552,16 +1552,16 @@
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-            "version": "1.7.6",
+            "version": "1.8.0",
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                 "url": "https://github.com/phpspec/prophecy.git",
-                "reference": "33a7e3c4fda54e912ff6338c48823bd5c0f0b712"
+                "reference": "4ba436b55987b4bf311cb7c6ba82aa528aac0a06"
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             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/33a7e3c4fda54e912ff6338c48823bd5c0f0b712",
-                "reference": "33a7e3c4fda54e912ff6338c48823bd5c0f0b712",
+                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/4ba436b55987b4bf311cb7c6ba82aa528aac0a06",
+                "reference": "4ba436b55987b4bf311cb7c6ba82aa528aac0a06",
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             },
             "require": {
@@ -1573,12 +1573,12 @@
             },
             "require-dev": {
                 "phpspec/phpspec": "^2.5|^3.2",
-                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.5"
+                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.5 || ^7.1"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.7.x-dev"
+                    "dev-master": "1.8.x-dev"
                 }
             },
             "autoload": {
@@ -1611,7 +1611,7 @@
                 "spy",
                 "stub"
             ],
-            "time": "2018-04-18T13:57:24+00:00"
+            "time": "2018-08-05T17:53:17+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
@@ -1864,16 +1864,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "7.2.7",
+            "version": "7.3.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "8e878aff7917ef66e702e03d1359b16eee254e2c"
+                "reference": "f9b14c17860eccb440a0352a117a81eb754cff5a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/8e878aff7917ef66e702e03d1359b16eee254e2c",
-                "reference": "8e878aff7917ef66e702e03d1359b16eee254e2c",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/f9b14c17860eccb440a0352a117a81eb754cff5a",
+                "reference": "f9b14c17860eccb440a0352a117a81eb754cff5a",
                 "shasum": ""
             },
             "require": {
@@ -1918,7 +1918,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "7.2-dev"
+                    "dev-master": "7.3-dev"
                 }
             },
             "autoload": {
@@ -1944,7 +1944,7 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2018-07-15T05:20:50+00:00"
+            "time": "2018-08-07T06:44:28+00:00"
         },
         {
             "name": "pimple/pimple",