diff --git a/composer.json b/composer.json
index 558046c..6fbf9be 100644
--- a/composer.json
+++ b/composer.json
@@ -10,9 +10,9 @@
         }
     ],
     "require": {
-        "php": ">=5.5",
+        "php": "^7.0",
         "phpdocumentor/reflection-common": "^1.0@dev",
-        "phpdocumentor/type-resolver": "^0.3.0",
+        "phpdocumentor/type-resolver": "^0.4.0",
         "webmozart/assert": "^1.0"
     },
     "autoload": {
diff --git a/composer.lock b/composer.lock
index c6ccaf6..b084e4b 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": "ebe054dae1f0c846f782bd6527e2da81",
+    "content-hash": "48bb5ebfcdb8f67b153795278f92ead4",
     "packages": [
         {
             "name": "phpdocumentor/reflection-common",
@@ -62,16 +62,16 @@
         },
         {
             "name": "phpdocumentor/type-resolver",
-            "version": "0.3.0",
+            "version": "0.4.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpDocumentor/TypeResolver.git",
-                "reference": "fb3933512008d8162b3cdf9e18dba9309b7c3773"
+                "reference": "9c977708995954784726e25d0cd1dddf4e65b0f7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/fb3933512008d8162b3cdf9e18dba9309b7c3773",
-                "reference": "fb3933512008d8162b3cdf9e18dba9309b7c3773",
+                "url": "https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/9c977708995954784726e25d0cd1dddf4e65b0f7",
+                "reference": "9c977708995954784726e25d0cd1dddf4e65b0f7",
                 "shasum": ""
             },
             "require": {
@@ -105,7 +105,7 @@
                     "email": "me@mikevanriel.com"
                 }
             ],
-            "time": "2017-06-03T08:32:36+00:00"
+            "time": "2017-07-14T14:27:02+00:00"
         },
         {
             "name": "webmozart/assert",
@@ -1123,7 +1123,7 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=5.5"
+        "php": "^7.0"
     },
     "platform-dev": []
 }