diff --git a/README.md b/README.md
index 6992564..ffc7ab7 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ which can be integrated as library into Icinga Web 2.
 ## Requirements
 
 * [Icinga Web 2](https://github.com/Icinga/icingaweb2) (>= 2.9)
-* PHP (>= 7.1.3)
+* PHP (>= 7.2)
 
 ## Installation
 
diff --git a/RELEASE.md b/RELEASE.md
index c28863e..db94aeb 100644
--- a/RELEASE.md
+++ b/RELEASE.md
@@ -8,4 +8,4 @@ e.g.
 
 ## Docker Example
 
-    docker run -it -v $(pwd):/tmp/pwd -w /tmp/pwd -v $(realpath ~/.gitconfig):/tmp/user/.gitconfig -e "HOME=/tmp/user" -u $(id -u):$(id -g) dev-docker_web56 bin/make-release.sh 1.0.0 --no-tag
+    docker run -it -v $(pwd):/tmp/pwd -w /tmp/pwd -v $(realpath ~/.gitconfig):/tmp/user/.gitconfig -e "HOME=/tmp/user" -u $(id -u):$(id -g) dev-docker_web72 bin/make-release.sh 1.0.0 --no-tag
diff --git a/composer.json b/composer.json
index ce10ba3..a0ec7a0 100644
--- a/composer.json
+++ b/composer.json
@@ -7,14 +7,17 @@
     "config": {
         "sort-packages": true,
         "platform": {
-            "php": "7.1.3"
+            "php": "7.2"
+        },
+        "allow-plugins": {
+            "cweagans/composer-patches": true
         }
     },
     "support": {
         "issues": "https://github.com/Icinga/icinga-php-thirdparty/issues"
     },
     "require": {
-        "php": ">=7.1.3",
+        "php": ">=7.2 <=8.1",
         "ext-curl": "*",
         "clue/block-react": "^1",
         "clue/connection-manager-extra": "^1",
@@ -25,7 +28,8 @@
         "clue/socket-raw": "^1",
         "clue/socks-react": "^1",
         "clue/stdio-react": "^2",
-        "evenement/evenement": "^2",
+        "cweagans/composer-patches": "~1.0",
+        "evenement/evenement": "^3",
         "predis/predis": "^1",
         "psr/http-message": "^1",
         "ramsey/uuid": "^3",
@@ -53,5 +57,13 @@
         "post-update-cmd": [
             "AssetLoader::update"
         ]
+    },
+    "extra": {
+        "composer-exit-on-patch-failure": true,
+        "patches": {
+            "ramsey/uuid": {
+                "Uuid: Add PHP 8.1 support": "patches/ramsey-uuid.patch"
+            }
+        }
     }
 }
diff --git a/patches/ramsey-uuid.patch b/patches/ramsey-uuid.patch
new file mode 100644
index 0000000..2715351
--- /dev/null
+++ b/patches/ramsey-uuid.patch
@@ -0,0 +1,10 @@
+--- a/vendor/ramsey/uuid/src/Uuid.php
++++ b/vendor/ramsey/uuid/src/Uuid.php
+@@ -212,6 +212,7 @@ class Uuid implements UuidInterface
+      * @return string
+      * @link http://php.net/manual/en/class.jsonserializable.php
+      */
++    #[\ReturnTypeWillChange]
+     public function jsonSerialize()
+     {
+         return $this->toString();