diff --git a/composer.lock b/composer.lock
index 3aba4cd..5fce5a0 100644
--- a/composer.lock
+++ b/composer.lock
@@ -1,7 +1,7 @@
 {
     "_readme": [
         "This file locks the dependencies of your project to a known state",
-        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
     "content-hash": "22a46c9158d2477f39a16f968966233c",
@@ -2225,16 +2225,16 @@
         },
         {
             "name": "sabberworm/php-css-parser",
-            "version": "8.1.0",
+            "version": "8.1.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sabberworm/PHP-CSS-Parser.git",
-                "reference": "850cbbcbe7fbb155387a151ea562897a67e242ef"
+                "reference": "b3683fba4e30963908265b039190a0e88f74c6fb"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sabberworm/PHP-CSS-Parser/zipball/850cbbcbe7fbb155387a151ea562897a67e242ef",
-                "reference": "850cbbcbe7fbb155387a151ea562897a67e242ef",
+                "url": "https://api.github.com/repos/sabberworm/PHP-CSS-Parser/zipball/b3683fba4e30963908265b039190a0e88f74c6fb",
+                "reference": "b3683fba4e30963908265b039190a0e88f74c6fb",
                 "shasum": ""
             },
             "require": {
@@ -2265,7 +2265,11 @@
                 "parser",
                 "stylesheet"
             ],
-            "time": "2016-07-19T19:14:21+00:00"
+            "support": {
+                "issues": "https://github.com/sabberworm/PHP-CSS-Parser/issues",
+                "source": "https://github.com/sabberworm/PHP-CSS-Parser/tree/8.1.1"
+            },
+            "time": "2020-06-01T09:09:10+00:00"
         },
         {
             "name": "swiftmailer/swiftmailer",
@@ -4941,5 +4945,6 @@
     "platform": {
         "php": ">=5.6.4"
     },
-    "platform-dev": []
+    "platform-dev": [],
+    "plugin-api-version": "2.2.0"
 }