diff --git a/composer.json b/composer.json
index ecfe95d..f90133d 100644
--- a/composer.json
+++ b/composer.json
@@ -37,7 +37,7 @@
         "php-http/curl-client": "^1.6",
         "propel/propel": "~2.0@dev",
         "slim/csrf": "^0.8.2",
-        "slim/slim": "^3.0",
+        "slim/slim": "^4.3",
         "slim/twig-view": "^2.2",
         "techwilk/twig-linewrap": "^1.0",
         "techwilk/twig-slim-csrf": "^1.0",
diff --git a/composer.lock b/composer.lock
index d1e3cdc..9e2e379 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
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         "This file is @generated automatically"
     ],
-    "content-hash": "e0b211d308d7cf20e3bf529c4374c471",
+    "content-hash": "b9e831b6be545ddbb5c3c8aedec63a68",
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             "name": "aptoma/twig-markdown",
@@ -115,38 +115,6 @@
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             "time": "2019-04-09T12:31:48+00:00"
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-                "reference": "79cbf1341c22ec75643d841642dd5d6acd83bdb8",
-                "shasum": ""
-            },
-            "require": {
-                "psr/container": "^1.0"
-            },
-            "type": "library",
-            "autoload": {
-                "psr-4": {
-                    "Interop\\Container\\": "src/Interop/Container/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "description": "Promoting the interoperability of container objects (DIC, SL, etc.)",
-            "homepage": "https://github.com/container-interop/container-interop",
-            "abandoned": "psr/container",
-            "time": "2017-02-14T19:40:03+00:00"
-        },
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             "name": "dpolac/dictionary",
             "version": "v1.0.0",
@@ -1384,56 +1352,6 @@
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             "time": "2016-01-26T13:27:02+00:00"
         },
-        {
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-            "version": "v3.2.3",
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-                "url": "https://github.com/silexphp/Pimple.git",
-                "reference": "9e403941ef9d65d20cba7d54e29fe906db42cf32"
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-                "url": "https://api.github.com/repos/silexphp/Pimple/zipball/9e403941ef9d65d20cba7d54e29fe906db42cf32",
-                "reference": "9e403941ef9d65d20cba7d54e29fe906db42cf32",
-                "shasum": ""
-            },
-            "require": {
-                "php": ">=5.3.0",
-                "psr/container": "^1.0"
-            },
-            "require-dev": {
-                "symfony/phpunit-bridge": "^3.2"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "3.2.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-0": {
-                    "Pimple": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Fabien Potencier",
-                    "email": "fabien@symfony.com"
-                }
-            ],
-            "description": "Pimple, a simple Dependency Injection Container",
-            "homepage": "http://pimple.sensiolabs.org",
-            "keywords": [
-                "container",
-                "dependency injection"
-            ],
-            "time": "2018-01-21T07:42:36+00:00"
-        },
         {
             "name": "propel/propel",
             "version": "dev-master",
@@ -1698,6 +1616,112 @@
             ],
             "time": "2016-08-06T14:39:51+00:00"
         },
+        {
+            "name": "psr/http-server-handler",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-server-handler.git",
+                "reference": "aff2f80e33b7f026ec96bb42f63242dc50ffcae7"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-server-handler/zipball/aff2f80e33b7f026ec96bb42f63242dc50ffcae7",
+                "reference": "aff2f80e33b7f026ec96bb42f63242dc50ffcae7",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.0",
+                "psr/http-message": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Server\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP server-side request handler",
+            "keywords": [
+                "handler",
+                "http",
+                "http-interop",
+                "psr",
+                "psr-15",
+                "psr-7",
+                "request",
+                "response",
+                "server"
+            ],
+            "time": "2018-10-30T16:46:14+00:00"
+        },
+        {
+            "name": "psr/http-server-middleware",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/php-fig/http-server-middleware.git",
+                "reference": "2296f45510945530b9dceb8bcedb5cb84d40c5f5"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/php-fig/http-server-middleware/zipball/2296f45510945530b9dceb8bcedb5cb84d40c5f5",
+                "reference": "2296f45510945530b9dceb8bcedb5cb84d40c5f5",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.0",
+                "psr/http-message": "^1.0",
+                "psr/http-server-handler": "^1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Psr\\Http\\Server\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "PHP-FIG",
+                    "homepage": "http://www.php-fig.org/"
+                }
+            ],
+            "description": "Common interface for HTTP server-side middleware",
+            "keywords": [
+                "http",
+                "http-interop",
+                "middleware",
+                "psr",
+                "psr-15",
+                "psr-7",
+                "request",
+                "response"
+            ],
+            "time": "2018-10-30T17:12:04+00:00"
+        },
         {
             "name": "psr/log",
             "version": "1.1.2",
@@ -1837,37 +1861,52 @@
         },
         {
             "name": "slim/slim",
-            "version": "3.12.1",
+            "version": "4.3.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/slimphp/Slim.git",
-                "reference": "eaee12ef8d0750db62b8c548016d82fb33addb6b"
+                "reference": "26020e9a099e69b0b12918115894f7106364dcb7"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/slimphp/Slim/zipball/eaee12ef8d0750db62b8c548016d82fb33addb6b",
-                "reference": "eaee12ef8d0750db62b8c548016d82fb33addb6b",
+                "url": "https://api.github.com/repos/slimphp/Slim/zipball/26020e9a099e69b0b12918115894f7106364dcb7",
+                "reference": "26020e9a099e69b0b12918115894f7106364dcb7",
                 "shasum": ""
             },
             "require": {
-                "container-interop/container-interop": "^1.2",
-                "nikic/fast-route": "^1.0",
-                "php": ">=5.5.0",
-                "pimple/pimple": "^3.0",
+                "ext-json": "*",
+                "nikic/fast-route": "^1.3",
+                "php": "^7.1",
                 "psr/container": "^1.0",
-                "psr/http-message": "^1.0"
-            },
-            "provide": {
-                "psr/http-message-implementation": "1.0"
+                "psr/http-factory": "^1.0",
+                "psr/http-message": "^1.0",
+                "psr/http-server-handler": "^1.0",
+                "psr/http-server-middleware": "^1.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.0",
-                "squizlabs/php_codesniffer": "^2.5"
+                "ext-simplexml": "*",
+                "guzzlehttp/psr7": "^1.5",
+                "http-interop/http-factory-guzzle": "^1.0",
+                "nyholm/psr7": "^1.1",
+                "nyholm/psr7-server": "^0.3.0",
+                "phpspec/prophecy": "^1.8",
+                "phpstan/phpstan": "^0.11.5",
+                "phpunit/phpunit": "^7.5",
+                "slim/http": "^0.7",
+                "slim/psr7": "^0.3",
+                "squizlabs/php_codesniffer": "^3.4.2",
+                "zendframework/zend-diactoros": "^2.1"
+            },
+            "suggest": {
+                "ext-simplexml": "Needed to support XML format in BodyParsingMiddleware",
+                "ext-xml": "Needed to support XML format in BodyParsingMiddleware",
+                "slim/psr7": "Slim PSR-7 implementation. See http://www.slimframework.com/docs/v4/start/installation.html for more information."
             },
             "type": "library",
             "autoload": {
                 "psr-4": {
-                    "Slim\\": "Slim"
+                    "Slim\\": "Slim",
+                    "Slim\\Tests\\": "tests"
                 }
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -1875,36 +1914,41 @@
                 "MIT"
             ],
             "authors": [
+                {
+                    "name": "Josh Lockhart",
+                    "email": "hello@joshlockhart.com",
+                    "homepage": "https://joshlockhart.com"
+                },
+                {
+                    "name": "Andrew Smith",
+                    "email": "a.smith@silentworks.co.uk",
+                    "homepage": "http://silentworks.co.uk"
+                },
                 {
                     "name": "Rob Allen",
                     "email": "rob@akrabat.com",
                     "homepage": "http://akrabat.com"
                 },
                 {
-                    "name": "Josh Lockhart",
-                    "email": "hello@joshlockhart.com",
-                    "homepage": "https://joshlockhart.com"
+                    "name": "Pierre Berube",
+                    "email": "pierre@lgse.com",
+                    "homepage": "http://www.lgse.com"
                 },
                 {
                     "name": "Gabriel Manricks",
                     "email": "gmanricks@me.com",
                     "homepage": "http://gabrielmanricks.com"
-                },
-                {
-                    "name": "Andrew Smith",
-                    "email": "a.smith@silentworks.co.uk",
-                    "homepage": "http://silentworks.co.uk"
                 }
             ],
             "description": "Slim is a PHP micro framework that helps you quickly write simple yet powerful web applications and APIs",
-            "homepage": "https://slimframework.com",
+            "homepage": "https://www.slimframework.com",
             "keywords": [
                 "api",
                 "framework",
                 "micro",
                 "router"
             ],
-            "time": "2019-04-16T16:47:29+00:00"
+            "time": "2019-10-05T21:24:58+00:00"
         },
         {
             "name": "slim/twig-view",