diff --git a/.github/settings.yml b/.github/settings.yml
index 71c2512..5511a20 100644
--- a/.github/settings.yml
+++ b/.github/settings.yml
@@ -28,6 +28,8 @@ branches:
           - context: "Tests (7.4, lowest)"
           - context: "Tests (8.0, highest)"
           - context: "Tests (8.0, lowest)"
+          - context: "Tests (8.1, highest)"
+          - context: "Tests (8.1, lowest)"
         strict: false
       restrictions: null
 
diff --git a/.github/workflows/integrate.yaml b/.github/workflows/integrate.yaml
index f1065ab..a26f516 100644
--- a/.github/workflows/integrate.yaml
+++ b/.github/workflows/integrate.yaml
@@ -249,6 +249,7 @@ jobs:
           - "7.3"
           - "7.4"
           - "8.0"
+          - "8.1"
 
         dependencies:
           - "lowest"
diff --git a/composer.json b/composer.json
index aabf72c..cc1cb9e 100644
--- a/composer.json
+++ b/composer.json
@@ -20,10 +20,10 @@
         }
     ],
     "require": {
-        "php": "~7.1.0 || ~7.2.0 || ~7.3.0 || ~7.4.0 || ~8.0.0"
+        "php": "~7.1.0 || ~7.2.0 || ~7.3.0 || ~7.4.0 || ~8.0.0 || ~8.1.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^7.5 || ^8.0",
+        "phpunit/phpunit": "^7.5.0 || ^8.5.23",
         "symfony/process": "^4.2 || ^5"
     },
     "config": {