diff --git a/.github/workflows/lint-php.yml b/.github/workflows/lint-php.yml
index 013fcee263..7a901bd474 100644
--- a/.github/workflows/lint-php.yml
+++ b/.github/workflows/lint-php.yml
@@ -25,7 +25,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: [ "8.0", "8.1", "8.2" ]
+        php-versions: [ "8.0", "8.1", "8.2", "8.3" ]
 
     name: php-lint
 
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index c1b2ce135d..e792fe030e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php-versions: ['8.0', '8.1', '8.2']
+        php-versions: ['8.0', '8.1', '8.2', '8.3']
         nextcloud-versions: ['master']
         include:
           - php-versions: '8.1'
@@ -72,6 +72,10 @@ jobs:
                   nextcloud-versions: stable27
                   db: 'sqlite'
                   cache: 'redis'
+                - php-versions: 8.3
+                  nextcloud-versions: master
+                  db: 'mysql'
+                  cache: 'nocache'
       name: ${{ matrix.nextcloud-versions }} w/ php${{ matrix.php-versions }}-${{ matrix.db }}-${{ matrix.cache }} integration tests
       services:
           mail-service:
diff --git a/appinfo/info.xml b/appinfo/info.xml
index 26053f8401..1b940c2fd0 100644
--- a/appinfo/info.xml
+++ b/appinfo/info.xml
@@ -46,7 +46,7 @@ Learn more about the Nextcloud Ethical AI Rating [in our blog](https://nextcloud
 	<repository type="git">https://github.com/nextcloud/mail.git</repository>
 	<screenshot>https://user-images.githubusercontent.com/12728974/266270227-86b99bbb-03ea-468b-8408-e248e1730bed.png</screenshot>
 	<dependencies>
-		<php min-version="8.0" max-version="8.2" />
+		<php min-version="8.0" max-version="8.3" />
 		<nextcloud min-version="26" max-version="28" />
 	</dependencies>
 	<background-jobs>
diff --git a/composer.json b/composer.json
index 8f183701af..a8a90f20a5 100644
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
 		"autoloader-suffix": "Mail"
 	},
 	"require": {
-		"php": ">=8.0 <=8.2",
+		"php": ">=8.0 <=8.3",
 		"ext-openssl": "*",
 		"arthurhoaro/favicon": "^1.3.3",
 		"bamarni/composer-bin-plugin": "^1.8.2",
diff --git a/composer.lock b/composer.lock
index ef7e17076c..17916872e7 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": "7824b6394746115af87722e406ccbade",
+    "content-hash": "5b23309d787ca186d07a895244eb17bd",
     "packages": [
         {
             "name": "amphp/amp",
@@ -4191,12 +4191,12 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": ">=8.0 <=8.2",
+        "php": ">=8.0 <=8.3",
         "ext-openssl": "*"
     },
     "platform-dev": [],
     "platform-overrides": {
         "php": "8.0"
     },
-    "plugin-api-version": "2.6.0"
+    "plugin-api-version": "2.3.0"
 }