diff --git a/composer.json b/composer.json
index b776f16..97f0b57 100644
--- a/composer.json
+++ b/composer.json
@@ -20,7 +20,7 @@
         }
     },
     "require": {
-        "php": "8.2.*"
+        "php": "8.3.*"
     },
     "require-dev": {
         "phpunit/phpunit": "^10.0",
diff --git a/composer.lock b/composer.lock
index bfeecb2..cfa77ed 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": "83517a77e0f61abacc8332b1d9565a72",
+    "content-hash": "b043ead93643b0ecaa96f11a4d86f225",
     "packages": [],
     "packages-dev": [
         {
@@ -3584,8 +3584,8 @@
     "prefer-stable": false,
     "prefer-lowest": false,
     "platform": {
-        "php": "8.2.*"
+        "php": "8.3.*"
     },
     "platform-dev": [],
-    "plugin-api-version": "2.3.0"
+    "plugin-api-version": "2.6.0"
 }
diff --git a/shell.nix b/shell.nix
index ad7bcfe..f1f1779 100644
--- a/shell.nix
+++ b/shell.nix
@@ -4,8 +4,8 @@ let
   projectInstall = pkgs.writeShellApplication {
     name = "project-install";
     runtimeInputs = [
-      pkgs.php82
-      pkgs.php82Packages.composer
+      pkgs.php83
+      pkgs.php83Packages.composer
       projectTest
     ];
     text = ''
@@ -16,7 +16,7 @@ let
   projectTest = pkgs.writeShellApplication {
     name = "project-test";
     runtimeInputs = [
-      pkgs.php82
+      pkgs.php83
     ];
     text = ''
       ./vendor/bin/phpunit
@@ -26,7 +26,7 @@ let
   projectRun = pkgs.writeShellApplication {
     name = "project-run";
     runtimeInputs = [
-      pkgs.php82
+      pkgs.php83
     ];
     text = ''
       php -S 127.0.0.1:8080 -t public
@@ -38,8 +38,8 @@ let
       pkgs.git
       pkgs.rsync
       # Missing ssh
-      pkgs.php82
-      pkgs.php82Packages.composer
+      pkgs.php83
+      pkgs.php83Packages.composer
       projectInstall
     ];
     text = ''
@@ -71,8 +71,8 @@ let
 in pkgs.mkShell {
   name = "Fediverse-Feed-Wrappers";
   buildInputs = [
-    pkgs.php82
-    pkgs.php82Packages.composer
+    pkgs.php83
+    pkgs.php83Packages.composer
     projectInstall
     projectTest
     projectRun