diff --git a/composer.json b/composer.json
index 1ba82d5c72e9c032173cf9e5dec593e62fb6e7d1..096f68957dbde383d94e0b78f6d7c0d5f7629920 100644
--- a/composer.json
+++ b/composer.json
@@ -122,7 +122,8 @@
         "wpackagist-theme/ff-multipurpose": "1.2.0",
         "wpackagist-plugin/two-factor-provider-webauthn": "1.0.3",
         "wpackagist-plugin/event-organiser": "3.12.0",
-        "noblogs/ai-authenticate-rest-api-plugin": "0.0.1"
+        "noblogs/ai-authenticate-rest-api-plugin": "0.0.1",
+        "wpackagist-plugin/multisite-custom-css": "^1.0"
     },    
     "extra": {
         "wordpress-install-dir": "app",
diff --git a/composer.lock b/composer.lock
index f23ee08f9cf12783f48051db0cf8877c157e171f..2f89dd4efaf2ed1c241c1e95f6a4a2d745bca66d 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": "57cdc72c603d23f31c4f0cfed18f0f94",
+    "content-hash": "858a9dc94eb6cb26367dc8e6519fcb2d",
     "packages": [
         {
             "name": "bjornjohansen/wplang",
@@ -1149,6 +1149,24 @@
             "type": "wordpress-plugin",
             "homepage": "https://wordpress.org/plugins/more-privacy-options/"
         },
+        {
+            "name": "wpackagist-plugin/multisite-custom-css",
+            "version": "1.0",
+            "source": {
+                "type": "svn",
+                "url": "https://plugins.svn.wordpress.org/multisite-custom-css/",
+                "reference": "trunk"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://downloads.wordpress.org/plugin/multisite-custom-css.zip?timestamp=1614471423"
+            },
+            "require": {
+                "composer/installers": "^1.0 || ^2.0"
+            },
+            "type": "wordpress-plugin",
+            "homepage": "https://wordpress.org/plugins/multisite-custom-css/"
+        },
         {
             "name": "wpackagist-plugin/nofollow-free",
             "version": "1.6.3",
@@ -2168,5 +2186,5 @@
         "php": ">=7.1"
     },
     "platform-dev": [],
-    "plugin-api-version": "2.3.0"
+    "plugin-api-version": "2.0.0"
 }