diff --git a/composer.json b/composer.json
index cb5c307..bf8c57c 100644
--- a/composer.json
+++ b/composer.json
@@ -21,7 +21,7 @@
     "autoload": {
         "psr-4": {
             "WellRESTed\\": "src/",
-            "Psr\\Http\\ServerMiddleware\\": "src-fig/"
+            "Psr\\Http\\Server\\": "src-fig/"
         }
     }
 }
diff --git a/composer.lock b/composer.lock
index b2088c5..fd7455e 100644
--- a/composer.lock
+++ b/composer.lock
@@ -114,37 +114,40 @@
         },
         {
             "name": "myclabs/deep-copy",
-            "version": "1.6.1",
+            "version": "1.7.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/myclabs/DeepCopy.git",
-                "reference": "8e6e04167378abf1ddb4d3522d8755c5fd90d102"
+                "reference": "3b8a3a99ba1f6a3952ac2747d989303cbd6b7a3e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/8e6e04167378abf1ddb4d3522d8755c5fd90d102",
-                "reference": "8e6e04167378abf1ddb4d3522d8755c5fd90d102",
+                "url": "https://api.github.com/repos/myclabs/DeepCopy/zipball/3b8a3a99ba1f6a3952ac2747d989303cbd6b7a3e",
+                "reference": "3b8a3a99ba1f6a3952ac2747d989303cbd6b7a3e",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.4.0"
+                "php": "^5.6 || ^7.0"
             },
             "require-dev": {
-                "doctrine/collections": "1.*",
-                "phpunit/phpunit": "~4.1"
+                "doctrine/collections": "^1.0",
+                "doctrine/common": "^2.6",
+                "phpunit/phpunit": "^4.1"
             },
             "type": "library",
             "autoload": {
                 "psr-4": {
                     "DeepCopy\\": "src/DeepCopy/"
-                }
+                },
+                "files": [
+                    "src/DeepCopy/deep_copy.php"
+                ]
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
                 "MIT"
             ],
             "description": "Create deep copies (clones) of your objects",
-            "homepage": "https://github.com/myclabs/DeepCopy",
             "keywords": [
                 "clone",
                 "copy",
@@ -152,7 +155,7 @@
                 "object",
                 "object graph"
             ],
-            "time": "2017-04-12T18:52:22+00:00"
+            "time": "2017-10-19T19:58:43+00:00"
         },
         {
             "name": "phar-io/manifest",
@@ -258,16 +261,16 @@
         },
         {
             "name": "phpdocumentor/reflection-common",
-            "version": "1.0",
+            "version": "1.0.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpDocumentor/ReflectionCommon.git",
-                "reference": "144c307535e82c8fdcaacbcfc1d6d8eeb896687c"
+                "reference": "21bdeb5f65d7ebf9f43b1b25d404f87deab5bfb6"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpDocumentor/ReflectionCommon/zipball/144c307535e82c8fdcaacbcfc1d6d8eeb896687c",
-                "reference": "144c307535e82c8fdcaacbcfc1d6d8eeb896687c",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionCommon/zipball/21bdeb5f65d7ebf9f43b1b25d404f87deab5bfb6",
+                "reference": "21bdeb5f65d7ebf9f43b1b25d404f87deab5bfb6",
                 "shasum": ""
             },
             "require": {
@@ -308,33 +311,39 @@
                 "reflection",
                 "static analysis"
             ],
-            "time": "2015-12-27T11:43:31+00:00"
+            "time": "2017-09-11T18:02:19+00:00"
         },
         {
             "name": "phpdocumentor/reflection-docblock",
-            "version": "3.2.0",
+            "version": "4.2.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpDocumentor/ReflectionDocBlock.git",
-                "reference": "46f7e8bb075036c92695b15a1ddb6971c751e585"
+                "reference": "66465776cfc249844bde6d117abff1d22e06c2da"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/46f7e8bb075036c92695b15a1ddb6971c751e585",
-                "reference": "46f7e8bb075036c92695b15a1ddb6971c751e585",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/66465776cfc249844bde6d117abff1d22e06c2da",
+                "reference": "66465776cfc249844bde6d117abff1d22e06c2da",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.5",
-                "phpdocumentor/reflection-common": "^1.0@dev",
+                "php": "^7.0",
+                "phpdocumentor/reflection-common": "^1.0.0",
                 "phpdocumentor/type-resolver": "^0.4.0",
                 "webmozart/assert": "^1.0"
             },
             "require-dev": {
-                "mockery/mockery": "^0.9.4",
-                "phpunit/phpunit": "^4.4"
+                "doctrine/instantiator": "~1.0.5",
+                "mockery/mockery": "^1.0",
+                "phpunit/phpunit": "^6.4"
             },
             "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "4.x-dev"
+                }
+            },
             "autoload": {
                 "psr-4": {
                     "phpDocumentor\\Reflection\\": [
@@ -353,7 +362,7 @@
                 }
             ],
             "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
-            "time": "2017-07-15T11:38:20+00:00"
+            "time": "2017-11-27T17:38:31+00:00"
         },
         {
             "name": "phpdocumentor/type-resolver",
@@ -404,33 +413,33 @@
         },
         {
             "name": "phpspec/prophecy",
-            "version": "v1.7.0",
+            "version": "1.7.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phpspec/prophecy.git",
-                "reference": "93d39f1f7f9326d746203c7c056f300f7f126073"
+                "reference": "e4ed002c67da8eceb0eb8ddb8b3847bb53c5c2bf"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/93d39f1f7f9326d746203c7c056f300f7f126073",
-                "reference": "93d39f1f7f9326d746203c7c056f300f7f126073",
+                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/e4ed002c67da8eceb0eb8ddb8b3847bb53c5c2bf",
+                "reference": "e4ed002c67da8eceb0eb8ddb8b3847bb53c5c2bf",
                 "shasum": ""
             },
             "require": {
                 "doctrine/instantiator": "^1.0.2",
                 "php": "^5.3|^7.0",
-                "phpdocumentor/reflection-docblock": "^2.0|^3.0.2",
+                "phpdocumentor/reflection-docblock": "^2.0|^3.0.2|^4.0",
                 "sebastian/comparator": "^1.1|^2.0",
                 "sebastian/recursion-context": "^1.0|^2.0|^3.0"
             },
             "require-dev": {
                 "phpspec/phpspec": "^2.5|^3.2",
-                "phpunit/phpunit": "^4.8 || ^5.6.5"
+                "phpunit/phpunit": "^4.8.35 || ^5.7"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.6.x-dev"
+                    "dev-master": "1.7.x-dev"
                 }
             },
             "autoload": {
@@ -463,45 +472,44 @@
                 "spy",
                 "stub"
             ],
-            "time": "2017-03-02T20:05:34+00:00"
+            "time": "2017-11-24T13:59:53+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
-            "version": "5.2.1",
+            "version": "5.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "dc421f9ca5082a0c0cb04afb171c765f79add85b"
+                "reference": "661f34d0bd3f1a7225ef491a70a020ad23a057a1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/dc421f9ca5082a0c0cb04afb171c765f79add85b",
-                "reference": "dc421f9ca5082a0c0cb04afb171c765f79add85b",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/661f34d0bd3f1a7225ef491a70a020ad23a057a1",
+                "reference": "661f34d0bd3f1a7225ef491a70a020ad23a057a1",
                 "shasum": ""
             },
             "require": {
                 "ext-dom": "*",
                 "ext-xmlwriter": "*",
                 "php": "^7.0",
-                "phpunit/php-file-iterator": "^1.3",
-                "phpunit/php-text-template": "^1.2",
-                "phpunit/php-token-stream": "^1.4.11 || ^2.0",
-                "sebastian/code-unit-reverse-lookup": "^1.0",
+                "phpunit/php-file-iterator": "^1.4.2",
+                "phpunit/php-text-template": "^1.2.1",
+                "phpunit/php-token-stream": "^2.0.1",
+                "sebastian/code-unit-reverse-lookup": "^1.0.1",
                 "sebastian/environment": "^3.0",
-                "sebastian/version": "^2.0",
+                "sebastian/version": "^2.0.1",
                 "theseer/tokenizer": "^1.1"
             },
             "require-dev": {
-                "ext-xdebug": "^2.5",
                 "phpunit/phpunit": "^6.0"
             },
             "suggest": {
-                "ext-xdebug": "^2.5.3"
+                "ext-xdebug": "^2.5.5"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "5.2.x-dev"
+                    "dev-master": "5.3.x-dev"
                 }
             },
             "autoload": {
@@ -516,7 +524,7 @@
             "authors": [
                 {
                     "name": "Sebastian Bergmann",
-                    "email": "sb@sebastian-bergmann.de",
+                    "email": "sebastian@phpunit.de",
                     "role": "lead"
                 }
             ],
@@ -527,20 +535,20 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2017-04-21T08:03:57+00:00"
+            "time": "2017-12-06T09:29:45+00:00"
         },
         {
             "name": "phpunit/php-file-iterator",
-            "version": "1.4.2",
+            "version": "1.4.5",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-file-iterator.git",
-                "reference": "3cc8f69b3028d0f96a9078e6295d86e9bf019be5"
+                "reference": "730b01bc3e867237eaac355e06a36b85dd93a8b4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-file-iterator/zipball/3cc8f69b3028d0f96a9078e6295d86e9bf019be5",
-                "reference": "3cc8f69b3028d0f96a9078e6295d86e9bf019be5",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-file-iterator/zipball/730b01bc3e867237eaac355e06a36b85dd93a8b4",
+                "reference": "730b01bc3e867237eaac355e06a36b85dd93a8b4",
                 "shasum": ""
             },
             "require": {
@@ -574,7 +582,7 @@
                 "filesystem",
                 "iterator"
             ],
-            "time": "2016-10-03T07:40:28+00:00"
+            "time": "2017-11-27T13:52:08+00:00"
         },
         {
             "name": "phpunit/php-text-template",
@@ -668,29 +676,29 @@
         },
         {
             "name": "phpunit/php-token-stream",
-            "version": "1.4.11",
+            "version": "2.0.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-token-stream.git",
-                "reference": "e03f8f67534427a787e21a385a67ec3ca6978ea7"
+                "reference": "791198a2c6254db10131eecfe8c06670700904db"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-token-stream/zipball/e03f8f67534427a787e21a385a67ec3ca6978ea7",
-                "reference": "e03f8f67534427a787e21a385a67ec3ca6978ea7",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-token-stream/zipball/791198a2c6254db10131eecfe8c06670700904db",
+                "reference": "791198a2c6254db10131eecfe8c06670700904db",
                 "shasum": ""
             },
             "require": {
                 "ext-tokenizer": "*",
-                "php": ">=5.3.3"
+                "php": "^7.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "~4.2"
+                "phpunit/phpunit": "^6.2.4"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.4-dev"
+                    "dev-master": "2.0-dev"
                 }
             },
             "autoload": {
@@ -713,20 +721,20 @@
             "keywords": [
                 "tokenizer"
             ],
-            "time": "2017-02-27T10:12:30+00:00"
+            "time": "2017-11-27T05:48:46+00:00"
         },
         {
             "name": "phpunit/phpunit",
-            "version": "6.2.3",
+            "version": "6.5.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "fa5711d0559fc4b64deba0702be52d41434cbcb7"
+                "reference": "882e886cc928a0abd3c61282b2a64026237d14a4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/fa5711d0559fc4b64deba0702be52d41434cbcb7",
-                "reference": "fa5711d0559fc4b64deba0702be52d41434cbcb7",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/882e886cc928a0abd3c61282b2a64026237d14a4",
+                "reference": "882e886cc928a0abd3c61282b2a64026237d14a4",
                 "shasum": ""
             },
             "require": {
@@ -735,24 +743,24 @@
                 "ext-libxml": "*",
                 "ext-mbstring": "*",
                 "ext-xml": "*",
-                "myclabs/deep-copy": "^1.3",
+                "myclabs/deep-copy": "^1.6.1",
                 "phar-io/manifest": "^1.0.1",
                 "phar-io/version": "^1.0",
                 "php": "^7.0",
                 "phpspec/prophecy": "^1.7",
-                "phpunit/php-code-coverage": "^5.2",
-                "phpunit/php-file-iterator": "^1.4",
-                "phpunit/php-text-template": "^1.2",
-                "phpunit/php-timer": "^1.0.6",
-                "phpunit/phpunit-mock-objects": "^4.0",
-                "sebastian/comparator": "^2.0",
-                "sebastian/diff": "^1.4.3 || ^2.0",
-                "sebastian/environment": "^3.0.2",
+                "phpunit/php-code-coverage": "^5.3",
+                "phpunit/php-file-iterator": "^1.4.3",
+                "phpunit/php-text-template": "^1.2.1",
+                "phpunit/php-timer": "^1.0.9",
+                "phpunit/phpunit-mock-objects": "^5.0.4",
+                "sebastian/comparator": "^2.1",
+                "sebastian/diff": "^2.0",
+                "sebastian/environment": "^3.1",
                 "sebastian/exporter": "^3.1",
-                "sebastian/global-state": "^1.1 || ^2.0",
-                "sebastian/object-enumerator": "^3.0.2",
+                "sebastian/global-state": "^2.0",
+                "sebastian/object-enumerator": "^3.0.3",
                 "sebastian/resource-operations": "^1.0",
-                "sebastian/version": "^2.0"
+                "sebastian/version": "^2.0.1"
             },
             "conflict": {
                 "phpdocumentor/reflection-docblock": "3.0.2",
@@ -771,7 +779,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "6.2.x-dev"
+                    "dev-master": "6.5.x-dev"
                 }
             },
             "autoload": {
@@ -797,33 +805,33 @@
                 "testing",
                 "xunit"
             ],
-            "time": "2017-07-03T15:54:24+00:00"
+            "time": "2017-12-06T09:42:03+00:00"
         },
         {
             "name": "phpunit/phpunit-mock-objects",
-            "version": "4.0.2",
+            "version": "5.0.4",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit-mock-objects.git",
-                "reference": "d8833b396dce9162bb2eb5d59aee5a3ab3cfa5b4"
+                "reference": "16b50f4167e5e85e81ca8a3dd105d0a5fd32009a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit-mock-objects/zipball/d8833b396dce9162bb2eb5d59aee5a3ab3cfa5b4",
-                "reference": "d8833b396dce9162bb2eb5d59aee5a3ab3cfa5b4",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit-mock-objects/zipball/16b50f4167e5e85e81ca8a3dd105d0a5fd32009a",
+                "reference": "16b50f4167e5e85e81ca8a3dd105d0a5fd32009a",
                 "shasum": ""
             },
             "require": {
-                "doctrine/instantiator": "^1.0.2",
+                "doctrine/instantiator": "^1.0.5",
                 "php": "^7.0",
-                "phpunit/php-text-template": "^1.2",
+                "phpunit/php-text-template": "^1.2.1",
                 "sebastian/exporter": "^3.0"
             },
             "conflict": {
                 "phpunit/phpunit": "<6.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^6.0"
+                "phpunit/phpunit": "^6.5"
             },
             "suggest": {
                 "ext-soap": "*"
@@ -831,7 +839,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.0.x-dev"
+                    "dev-master": "5.0.x-dev"
                 }
             },
             "autoload": {
@@ -846,7 +854,7 @@
             "authors": [
                 {
                     "name": "Sebastian Bergmann",
-                    "email": "sb@sebastian-bergmann.de",
+                    "email": "sebastian@phpunit.de",
                     "role": "lead"
                 }
             ],
@@ -856,7 +864,7 @@
                 "mock",
                 "xunit"
             ],
-            "time": "2017-06-30T08:15:21+00:00"
+            "time": "2017-12-02T05:31:19+00:00"
         },
         {
             "name": "sebastian/code-unit-reverse-lookup",
@@ -905,30 +913,30 @@
         },
         {
             "name": "sebastian/comparator",
-            "version": "2.0.0",
+            "version": "2.1.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/comparator.git",
-                "reference": "20f84f468cb67efee293246e6a09619b891f55f0"
+                "reference": "1174d9018191e93cb9d719edec01257fc05f8158"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/comparator/zipball/20f84f468cb67efee293246e6a09619b891f55f0",
-                "reference": "20f84f468cb67efee293246e6a09619b891f55f0",
+                "url": "https://api.github.com/repos/sebastianbergmann/comparator/zipball/1174d9018191e93cb9d719edec01257fc05f8158",
+                "reference": "1174d9018191e93cb9d719edec01257fc05f8158",
                 "shasum": ""
             },
             "require": {
                 "php": "^7.0",
-                "sebastian/diff": "^1.2",
-                "sebastian/exporter": "^3.0"
+                "sebastian/diff": "^2.0",
+                "sebastian/exporter": "^3.1"
             },
             "require-dev": {
-                "phpunit/phpunit": "^6.0"
+                "phpunit/phpunit": "^6.4"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.0.x-dev"
+                    "dev-master": "2.1.x-dev"
                 }
             },
             "autoload": {
@@ -959,38 +967,38 @@
                 }
             ],
             "description": "Provides the functionality to compare PHP values for equality",
-            "homepage": "http://www.github.com/sebastianbergmann/comparator",
+            "homepage": "https://github.com/sebastianbergmann/comparator",
             "keywords": [
                 "comparator",
                 "compare",
                 "equality"
             ],
-            "time": "2017-03-03T06:26:08+00:00"
+            "time": "2017-11-03T07:16:52+00:00"
         },
         {
             "name": "sebastian/diff",
-            "version": "1.4.3",
+            "version": "2.0.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/diff.git",
-                "reference": "7f066a26a962dbe58ddea9f72a4e82874a3975a4"
+                "reference": "347c1d8b49c5c3ee30c7040ea6fc446790e6bddd"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/7f066a26a962dbe58ddea9f72a4e82874a3975a4",
-                "reference": "7f066a26a962dbe58ddea9f72a4e82874a3975a4",
+                "url": "https://api.github.com/repos/sebastianbergmann/diff/zipball/347c1d8b49c5c3ee30c7040ea6fc446790e6bddd",
+                "reference": "347c1d8b49c5c3ee30c7040ea6fc446790e6bddd",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.3.3 || ^7.0"
+                "php": "^7.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.8.35 || ^5.7 || ^6.0"
+                "phpunit/phpunit": "^6.2"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.4-dev"
+                    "dev-master": "2.0-dev"
                 }
             },
             "autoload": {
@@ -1017,7 +1025,7 @@
             "keywords": [
                 "diff"
             ],
-            "time": "2017-05-22T07:24:03+00:00"
+            "time": "2017-08-03T08:09:46+00:00"
         },
         {
             "name": "sebastian/environment",
@@ -1189,21 +1197,21 @@
         },
         {
             "name": "sebastian/object-enumerator",
-            "version": "3.0.2",
+            "version": "3.0.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/object-enumerator.git",
-                "reference": "31dd3379d16446c5d86dec32ab1ad1f378581ad8"
+                "reference": "7cfd9e65d11ffb5af41198476395774d4c8a84c5"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/31dd3379d16446c5d86dec32ab1ad1f378581ad8",
-                "reference": "31dd3379d16446c5d86dec32ab1ad1f378581ad8",
+                "url": "https://api.github.com/repos/sebastianbergmann/object-enumerator/zipball/7cfd9e65d11ffb5af41198476395774d4c8a84c5",
+                "reference": "7cfd9e65d11ffb5af41198476395774d4c8a84c5",
                 "shasum": ""
             },
             "require": {
                 "php": "^7.0",
-                "sebastian/object-reflector": "^1.0",
+                "sebastian/object-reflector": "^1.1.1",
                 "sebastian/recursion-context": "^3.0"
             },
             "require-dev": {
@@ -1232,7 +1240,7 @@
             ],
             "description": "Traverses array structures and object graphs to enumerate all referenced objects",
             "homepage": "https://github.com/sebastianbergmann/object-enumerator/",
-            "time": "2017-03-12T15:17:29+00:00"
+            "time": "2017-08-03T12:35:26+00:00"
         },
         {
             "name": "sebastian/object-reflector",
diff --git a/src-fig/DelegateInterface.php b/src-fig/DelegateInterface.php
deleted file mode 100644
index e4c4e46..0000000
--- a/src-fig/DelegateInterface.php
+++ /dev/null
@@ -1,7 +0,0 @@
-<?php
-
-namespace Psr\Http\ServerMiddleware;
-
-interface DelegateInterface extends HandleInterface
-{
-}
diff --git a/src-fig/HandleInterface.php b/src-fig/HandleInterface.php
deleted file mode 100644
index 0739ced..0000000
--- a/src-fig/HandleInterface.php
+++ /dev/null
@@ -1,12 +0,0 @@
-<?php
-
-namespace Psr\Http\ServerMiddleware;
-
-use Psr\Http\Message\ResponseInterface;
-use Psr\Http\Message\ServerRequestInterface;
-
-interface HandleInterface
-{
-    public function __invoke(ServerRequestInterface $request): ResponseInterface;
-}
-
diff --git a/src-fig/MiddlewareInterface.php b/src-fig/MiddlewareInterface.php
index bb2e3cc..8c139a0 100644
--- a/src-fig/MiddlewareInterface.php
+++ b/src-fig/MiddlewareInterface.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Psr\Http\ServerMiddleware;
+namespace Psr\Http\Server;
 
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
@@ -9,5 +9,5 @@ interface MiddlewareInterface
 {
     public function process(
         ServerRequestInterface $request,
-        DelegateInterface $delegate): ResponseInterface;
+        RequestHandlerInterface $handler): ResponseInterface;
 }
diff --git a/src-fig/RequestHandlerInterface.php b/src-fig/RequestHandlerInterface.php
new file mode 100644
index 0000000..cbda5e8
--- /dev/null
+++ b/src-fig/RequestHandlerInterface.php
@@ -0,0 +1,11 @@
+<?php
+
+namespace Psr\Http\Server;
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+
+interface RequestHandlerInterface
+{
+    public function handle(ServerRequestInterface $request): ResponseInterface;
+}
diff --git a/src/Dispatching/Dispatcher.php b/src/Dispatching/Dispatcher.php
index 913c3af..38444fa 100644
--- a/src/Dispatching/Dispatcher.php
+++ b/src/Dispatching/Dispatcher.php
@@ -4,7 +4,8 @@ namespace WellRESTed\Dispatching;
 
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
-use Psr\Http\ServerMiddleware\MiddlewareInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
 
 class Dispatcher implements DispatcherInterface
 {
@@ -32,6 +33,8 @@ class Dispatcher implements DispatcherInterface
 
         if (is_callable($dispatchable)) {
             return $dispatchable($request, $response, $next);
+        } elseif ($dispatchable instanceof RequestHandlerInterface) {
+            return $dispatchable->handle($request);
         } elseif ($dispatchable instanceof MiddlewareInterface) {
             $delegate = new DispatcherDelegate($response, $next);
             return $dispatchable->process($request, $delegate);
diff --git a/src/Dispatching/DispatcherDelegate.php b/src/Dispatching/DispatcherDelegate.php
index 225792b..9dd8650 100644
--- a/src/Dispatching/DispatcherDelegate.php
+++ b/src/Dispatching/DispatcherDelegate.php
@@ -4,12 +4,12 @@ namespace WellRESTed\Dispatching;
 
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
-use Psr\Http\ServerMiddleware\DelegateInterface;
+use Psr\Http\Server\RequestHandlerInterface;
 
 /**
  * Adapter to allow use of PSR-15 Middleware with double pass implementations.
  */
-class DispatcherDelegate implements DelegateInterface
+class DispatcherDelegate implements RequestHandlerInterface
 {
     /** @var ResponseInterface */
     private $response;
@@ -22,7 +22,7 @@ class DispatcherDelegate implements DelegateInterface
         $this->next = $next;
     }
 
-    public function __invoke(ServerRequestInterface $request): ResponseInterface
+    public function handle(ServerRequestInterface $request): ResponseInterface
     {
         return call_user_func($this->next, $request, $this->response);
     }
diff --git a/test/tests/unit/Dispatching/DispatcherTest.php b/test/tests/unit/Dispatching/DispatcherTest.php
index a2e7fb5..6f41e7f 100644
--- a/test/tests/unit/Dispatching/DispatcherTest.php
+++ b/test/tests/unit/Dispatching/DispatcherTest.php
@@ -4,7 +4,7 @@ namespace WellRESTed\Test\Unit\Dispatching;
 
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
-use Psr\Http\ServerMiddleware\DelegateInterface;
+use Psr\Http\Server\RequestHandlerInterface;
 use WellRESTed\Dispatching\Dispatcher;
 use WellRESTed\Message\Response;
 use WellRESTed\Message\ServerRequest;
@@ -12,8 +12,6 @@ use WellRESTed\MiddlewareInterface;
 use WellRESTed\Test\Doubles\NextMock;
 use WellRESTed\Test\TestCase;
 
-use Psr\Http\ServerMiddleware\HandleInterface;
-
 class DispatcherTest extends TestCase
 {
     /** @var ServerRequestInterface */
@@ -185,7 +183,7 @@ class DoublePassMiddlewareDouble implements MiddlewareInterface
 /**
  * PSR-15 Handler that returns a ResponseInterface stub
  */
-class HandlerDouble implements HandleInterface
+class HandlerDouble implements RequestHandlerInterface
 {
     /** @var ResponseInterface */
     private $response;
@@ -194,7 +192,7 @@ class HandlerDouble implements HandleInterface
         $this->response = $response;
     }
 
-    public function __invoke(ServerRequestInterface $request): ResponseInterface
+    public function handle(ServerRequestInterface $request): ResponseInterface
     {
         return $this->response;
     }
@@ -206,12 +204,12 @@ class HandlerDouble implements HandleInterface
  * PSR-15 Middleware that passes the request to the delegate and returns the
  * delegate's response
  */
-class MiddlewareDouble implements \Psr\Http\ServerMiddleware\MiddlewareInterface
+class MiddlewareDouble implements \Psr\Http\Server\MiddlewareInterface
 {
     public function process(
         ServerRequestInterface $request,
-        DelegateInterface $delegate
+        RequestHandlerInterface $handler
     ): ResponseInterface {
-        return $delegate($request);
+        return $handler->handle($request);
     }
 }