diff --git a/composer.json b/composer.json
index d682786..8369b4b 100644
--- a/composer.json
+++ b/composer.json
@@ -22,6 +22,7 @@
         "phlak/splat": "^4.0",
         "php-di/php-di": "^6.0",
         "php-di/slim-bridge": "^3.0",
+        "psr/cache": "^1.0",
         "psr/http-message": "^1.0.1",
         "slim/psr7": "^1.0",
         "slim/slim": "^4.3",
diff --git a/composer.lock b/composer.lock
index 8f838a2..2585e65 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": "312ad2f3da3a10bc06ae3914cc97a9fa",
+    "content-hash": "91d56fb5c09c6eaeb2e1ad4e46de3d4d",
     "packages": [
         {
             "name": "erusev/parsedown",
@@ -761,20 +761,20 @@
         },
         {
             "name": "psr/cache",
-            "version": "2.0.0",
+            "version": "1.0.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/php-fig/cache.git",
-                "reference": "213f9dbc5b9bfbc4f8db86d2838dc968752ce13b"
+                "reference": "d11b50ad223250cf17b86e38383413f5a6764bf8"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/php-fig/cache/zipball/213f9dbc5b9bfbc4f8db86d2838dc968752ce13b",
-                "reference": "213f9dbc5b9bfbc4f8db86d2838dc968752ce13b",
+                "url": "https://api.github.com/repos/php-fig/cache/zipball/d11b50ad223250cf17b86e38383413f5a6764bf8",
+                "reference": "d11b50ad223250cf17b86e38383413f5a6764bf8",
                 "shasum": ""
             },
             "require": {
-                "php": ">=8.0.0"
+                "php": ">=5.3.0"
             },
             "type": "library",
             "extra": {
@@ -794,7 +794,7 @@
             "authors": [
                 {
                     "name": "PHP-FIG",
-                    "homepage": "https://www.php-fig.org/"
+                    "homepage": "http://www.php-fig.org/"
                 }
             ],
             "description": "Common interface for caching libraries",
@@ -804,9 +804,9 @@
                 "psr-6"
             ],
             "support": {
-                "source": "https://github.com/php-fig/cache/tree/2.0.0"
+                "source": "https://github.com/php-fig/cache/tree/master"
             },
-            "time": "2021-02-03T23:23:37+00:00"
+            "time": "2016-08-06T20:24:11+00:00"
         },
         {
             "name": "psr/container",
@@ -6704,16 +6704,16 @@
         },
         {
             "name": "vimeo/psalm",
-            "version": "4.8.0",
+            "version": "4.8.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/vimeo/psalm.git",
-                "reference": "0a57c865499049527b3e1c47f14abea761d94b83"
+                "reference": "f73f2299dbc59a3e6c4d66cff4605176e728ee69"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/vimeo/psalm/zipball/0a57c865499049527b3e1c47f14abea761d94b83",
-                "reference": "0a57c865499049527b3e1c47f14abea761d94b83",
+                "url": "https://api.github.com/repos/vimeo/psalm/zipball/f73f2299dbc59a3e6c4d66cff4605176e728ee69",
+                "reference": "f73f2299dbc59a3e6c4d66cff4605176e728ee69",
                 "shasum": ""
             },
             "require": {
@@ -6803,9 +6803,9 @@
             ],
             "support": {
                 "issues": "https://github.com/vimeo/psalm/issues",
-                "source": "https://github.com/vimeo/psalm/tree/4.8.0"
+                "source": "https://github.com/vimeo/psalm/tree/4.8.1"
             },
-            "time": "2021-06-20T18:12:20+00:00"
+            "time": "2021-06-20T23:03:20+00:00"
         },
         {
             "name": "webmozart/assert",
@@ -6991,5 +6991,5 @@
         "ext-zip": "*"
     },
     "platform-dev": [],
-    "plugin-api-version": "2.0.0"
+    "plugin-api-version": "2.1.0"
 }