diff --git a/composer.json b/composer.json
index 0c2cc3c6..a5225d41 100644
--- a/composer.json
+++ b/composer.json
@@ -25,7 +25,7 @@
   },
   "require-dev": {
     "composer/composer": "^1.7.0",
-    "jangregor/phpstan-prophecy": "~0.3.0",
+    "jangregor/phpstan-prophecy": "~0.4.2",
     "localheinz/php-cs-fixer-config": "~1.22.1",
     "localheinz/phpstan-rules": "~0.7.1",
     "localheinz/test-util": "~0.7.0",
diff --git a/composer.lock b/composer.lock
index 1d5b9888..fc83f249 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "f3ca19b0efa6e2b5fcc9b5c8f09208af",
+    "content-hash": "17932e6d0578642a8025671eca9c5bd4",
     "packages": [
         {
             "name": "justinrainbow/json-schema",
@@ -903,16 +903,16 @@
         },
         {
             "name": "jangregor/phpstan-prophecy",
-            "version": "0.3.0",
+            "version": "0.4.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/Jan0707/phpstan-prophecy.git",
-                "reference": "a1bfe3c3920829d4004240fb68ed85ab6dd18b14"
+                "reference": "23301ff577da974e47e8670bf9313c885d306011"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Jan0707/phpstan-prophecy/zipball/a1bfe3c3920829d4004240fb68ed85ab6dd18b14",
-                "reference": "a1bfe3c3920829d4004240fb68ed85ab6dd18b14",
+                "url": "https://api.github.com/repos/Jan0707/phpstan-prophecy/zipball/23301ff577da974e47e8670bf9313c885d306011",
+                "reference": "23301ff577da974e47e8670bf9313c885d306011",
                 "shasum": ""
             },
             "require": {
@@ -920,15 +920,23 @@
                 "phpstan/phpstan": "^0.10.0 || ^0.11.0"
             },
             "conflict": {
-                "phpspec/prophecy": "<1.7, >=2.0",
-                "phpunit/phpunit": "<6.0, >=8.0"
+                "phpspec/prophecy": "<1.7,>=2.0",
+                "phpunit/phpunit": "<6.0,>=9.0"
             },
             "require-dev": {
-                "friendsofphp/php-cs-fixer": "^2.13.1",
+                "friendsofphp/php-cs-fixer": "~2.15.0",
+                "localheinz/composer-normalize": "^1.1.3",
                 "phpspec/prophecy": "^1.7",
-                "phpunit/phpunit": "^6.0||^7.0"
+                "phpunit/phpunit": "^6.0 || ^7.0"
+            },
+            "type": "phpstan-extension",
+            "extra": {
+                "phpstan": {
+                    "includes": [
+                        "src/extension.neon"
+                    ]
+                }
             },
-            "type": "library",
             "autoload": {
                 "psr-4": {
                     "JanGregor\\Prophecy\\": "src/"
@@ -945,7 +953,7 @@
                 }
             ],
             "description": "Provides a phpstan/phpstan extension for phpspec/prophecy",
-            "time": "2019-01-18T13:44:45+00:00"
+            "time": "2019-07-31T13:51:23+00:00"
         },
         {
             "name": "jean85/pretty-package-versions",
@@ -4466,7 +4474,8 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "^7.1"
+        "php": "^7.1",
+        "composer-plugin-api": "^1.1.0"
     },
     "platform-dev": []
 }