diff --git a/composer.json b/composer.json
index c7a2f97..a49b640 100644
--- a/composer.json
+++ b/composer.json
@@ -18,6 +18,7 @@
     "require": {
         "php": ">=7.3",
         "composer/installers": "^1.2",
+        "drupal/advagg": "4.x-dev@dev",
         "drupal/amswap": "^2.0",
         "drupal/audiofield": "^1.10",
         "drupal/auto_entitylabel": "^2.x-dev",
diff --git a/composer.lock b/composer.lock
index 629e244..a0eb03f 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": "2b6c97c508e1b1b31b24c28d1aa1d636",
+    "content-hash": "c36d74f987088bbcb7f5e358043b7264",
     "packages": [
         {
             "name": "alchemy/zippy",
@@ -2714,6 +2714,84 @@
                 "issues": "https://www.drupal.org/project/issues/adminimal_theme"
             }
         },
+        {
+            "name": "drupal/advagg",
+            "version": "dev-4.x",
+            "source": {
+                "type": "git",
+                "url": "https://git.drupalcode.org/project/advagg.git",
+                "reference": "998266aa62c7f6a3beaa5b79a219f8c6dc4e8b92"
+            },
+            "require": {
+                "drupal/core": "^8.8 || ^9",
+                "tubalmartin/cssmin": "^4.1"
+            },
+            "type": "drupal-module",
+            "extra": {
+                "branch-alias": {
+                    "dev-4.x": "4.x-dev"
+                },
+                "drupal": {
+                    "version": "8.x-4.1+4-dev",
+                    "datestamp": "1610042748",
+                    "security-coverage": {
+                        "status": "not-covered",
+                        "message": "Dev releases are not covered by Drupal security advisories."
+                    }
+                },
+                "drush": {
+                    "services": {
+                        "drush.services.yml": "^9"
+                    }
+                }
+            },
+            "notification-url": "https://packages.drupal.org/8/downloads",
+            "license": [
+                "GPL-2.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "Mike Carper (mikeytown2)",
+                    "homepage": "https://www.drupal.org/u/mikeytown2",
+                    "role": "Creator, Maintainer"
+                },
+                {
+                    "name": "Nick Wilde (nickwilde)",
+                    "homepage": "https://www.drupal.org/u/nickwilde",
+                    "email": "design@briarmoon.ca",
+                    "role": "Drupal 8 Port/maintainer"
+                },
+                {
+                    "name": "Other Contributors",
+                    "homepage": "https://www.drupal.org/node/1066416/committers",
+                    "role": "Contributors"
+                },
+                {
+                    "name": "iamcarrico",
+                    "homepage": "https://www.drupal.org/user/1300542"
+                },
+                {
+                    "name": "mikeytown2",
+                    "homepage": "https://www.drupal.org/user/282446"
+                },
+                {
+                    "name": "rupl",
+                    "homepage": "https://www.drupal.org/user/411999"
+                },
+                {
+                    "name": "thalles",
+                    "homepage": "https://www.drupal.org/user/3589086"
+                }
+            ],
+            "description": "Improved aggregation of CSS/JS files to speed up page load times.",
+            "homepage": "https://drupal.org/project/advagg",
+            "support": {
+                "source": "https://git.drupalcode.org/project/advagg",
+                "issues": "https://drupal.org/project/issues/advagg",
+                "irc": "irc://irc.freenode.org/drupal-contribute"
+            },
+            "time": "2021-01-07T20:09:11+00:00"
+        },
         {
             "name": "drupal/advanced_text_formatter",
             "version": "1.0.0",
@@ -18835,6 +18913,59 @@
             ],
             "time": "2020-02-14T14:20:12+00:00"
         },
+        {
+            "name": "tubalmartin/cssmin",
+            "version": "v4.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/tubalmartin/YUI-CSS-compressor-PHP-port.git",
+                "reference": "3cbf557f4079d83a06f9c3ff9b957c022d7805cf"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/tubalmartin/YUI-CSS-compressor-PHP-port/zipball/3cbf557f4079d83a06f9c3ff9b957c022d7805cf",
+                "reference": "3cbf557f4079d83a06f9c3ff9b957c022d7805cf",
+                "shasum": ""
+            },
+            "require": {
+                "ext-pcre": "*",
+                "php": ">=5.3.2"
+            },
+            "require-dev": {
+                "cogpowered/finediff": "0.3.*",
+                "phpunit/phpunit": "4.8.*"
+            },
+            "bin": [
+                "cssmin"
+            ],
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "tubalmartin\\CssMin\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Túbal Martín",
+                    "homepage": "http://tubalmartin.me/"
+                }
+            ],
+            "description": "A PHP port of the YUI CSS compressor",
+            "homepage": "https://github.com/tubalmartin/YUI-CSS-compressor-PHP-port",
+            "keywords": [
+                "compress",
+                "compressor",
+                "css",
+                "cssmin",
+                "minify",
+                "yui"
+            ],
+            "time": "2018-01-15T15:26:51+00:00"
+        },
         {
             "name": "twig/twig",
             "version": "v1.44.2",
@@ -19385,6 +19516,7 @@
     ],
     "minimum-stability": "dev",
     "stability-flags": {
+        "drupal/advagg": 20,
         "drupal/auto_entitylabel": 20,
         "drupal/commerce_license": 20,
         "drupal/commerce_pricelist": 20,