diff --git a/.github/settings.yml b/.github/settings.yml
index 5447b54b..cdb0b512 100644
--- a/.github/settings.yml
+++ b/.github/settings.yml
@@ -27,6 +27,9 @@ branches:
           - context: "Tests (8.2, highest)"
           - context: "Tests (8.2, locked)"
           - context: "Tests (8.2, lowest)"
+          - context: "Tests (8.3, highest)"
+          - context: "Tests (8.3, locked)"
+          - context: "Tests (8.3, lowest)"
         strict: false
       restrictions:
 
diff --git a/.github/workflows/integrate.yaml b/.github/workflows/integrate.yaml
index 3f598828..81083f4c 100644
--- a/.github/workflows/integrate.yaml
+++ b/.github/workflows/integrate.yaml
@@ -427,6 +427,7 @@ jobs:
         php-version:
           - "8.1"
           - "8.2"
+          - "8.3"
 
         dependencies:
           - "lowest"
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 84fef01d..f66d9be2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ For a full diff see [`3.2.0...main`][3.2.0...main].
 ## Changed
 
 - Dropped support for PHP 8.0 ([#209]), by [@localheinz]
+- Added support for PHP 8.3 ([#271]), by [@localheinz]
 
 ## [`3.2.0`][3.2.0]
 
@@ -115,5 +116,6 @@ For a full diff see [`a5ba52c...1.0.0`][a5ba52c...1.0.0].
 [#119]: https://github.com/ergebnis/json-pointer/pull/119
 [#123]: https://github.com/ergebnis/json-pointer/pull/123
 [#209]: https://github.com/ergebnis/json-pointer/pull/209
+[#271]: https://github.com/ergebnis/json-pointer/pull/271
 
 [@localheinz]: https://github.com/localheinz
diff --git a/composer.json b/composer.json
index f7a03f24..145dfc5d 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
     "security": "https://github.com/ergebnis/json-pointer/blob/main/.github/SECURITY.md"
   },
   "require": {
-    "php": "~8.1.0 || ~8.2.0"
+    "php": "~8.1.0 || ~8.2.0 || ~8.3.0"
   },
   "require-dev": {
     "ergebnis/composer-normalize": "^2.29.0",
diff --git a/composer.lock b/composer.lock
index e337f40a..9944ab01 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": "03fa3651f1d8df8ff99db1ccda2c38f2",
+    "content-hash": "6741bc7b01bd933965caa5c7daecff86",
     "packages": [],
     "packages-dev": [
         {
@@ -6106,11 +6106,11 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "~8.1.0 || ~8.2.0"
+        "php": "~8.1.0 || ~8.2.0 || ~8.3.0"
     },
     "platform-dev": [],
     "platform-overrides": {
         "php": "8.1.20"
     },
-    "plugin-api-version": "2.3.0"
+    "plugin-api-version": "2.6.0"
 }