diff --git a/composer.json b/composer.json
index 4e62357fe787132ae1afbc454e82cad26b0d2b38..5adfabbe9f53aa8680fbac9a761c3ed845e716ca 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 f48a665e92b4d3b7d24f1906da22417add5be4a5..49df6975debf157e523f30a73166fb05a074c4ae 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": "11a1a8b81795528f142109b8ebb107f6",
+    "content-hash": "253884d4623dd2c7e676490aaa8080e0",
     "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"
 }