diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 2c25ca98..c04abf2e 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - "8.1"
+          - "8.2"
 
     steps:
       - uses: "actions/checkout@v4"
@@ -39,11 +39,11 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - "8.2"
+          - "8.3"
         code-coverage:
           - "none"
         include:
-          - php-version: "8.1"
+          - php-version: "8.2"
             code-coverage: "pcov"
 
     env:
@@ -89,7 +89,7 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - "8.1"
+          - "8.2"
 
     steps:
       - uses: "actions/checkout@v4"
@@ -108,7 +108,7 @@ jobs:
     strategy:
       matrix:
         php-version:
-          - "8.1"
+          - "8.2"
 
     steps:
       - uses: "actions/checkout@v4"
diff --git a/.php-cs-fixer.php b/.php-cs-fixer.php
index 83d51246..11bbc9bd 100644
--- a/.php-cs-fixer.php
+++ b/.php-cs-fixer.php
@@ -17,7 +17,7 @@
         'binary_operator_spaces'                    => ['default' => 'align_single_space'],
         'blank_line_before_statement'               => true,
         'class_definition'                          => ['single_item_single_line' => true],
-        'compact_nullable_typehint'                 => true,
+        'compact_nullable_type_declaration'         => true,
         'concat_space'                              => ['spacing' => 'one'],
         'echo_tag_syntax'                           => ['format' => 'long'],
         'error_suppression'                         => false,
@@ -39,7 +39,7 @@
         'no_null_property_initialization'           => true,
         'no_php4_constructor'                       => true,
         'no_superfluous_elseif'                     => true,
-        'no_unneeded_curly_braces'                  => true,
+        'no_unneeded_braces'                        => true,
         'no_unneeded_final_method'                  => true,
         'no_unreachable_default_argument_value'     => true,
         'no_useless_else'                           => true,
diff --git a/Makefile b/Makefile
index 5e83353f..a1f3eac4 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-PHP_DOCKER_VERSION := thecodingmachine/php:8.1-v4-cli
+PHP_DOCKER_VERSION := thecodingmachine/php:8.2-v4-cli
 PHP_BIN := docker run -it --rm \
 	--network=ddeboer_imap_network \
 	--env IMAP_SERVER_NAME=ddeboer_imap_server \
diff --git a/README.md b/README.md
index 57e9a420..8fea9782 100644
--- a/README.md
+++ b/README.md
@@ -7,7 +7,7 @@
 
 A PHP IMAP library to read and process e-mails over IMAP protocol, built with robust Object-Oriented architecture.
 
-This library requires PHP >= 8.1 with [IMAP](https://www.php.net/manual/en/book.imap.php),
+This library requires PHP >= 8.2 with [IMAP](https://www.php.net/manual/en/book.imap.php),
 [iconv](https://www.php.net/manual/en/book.iconv.php) and
 [Multibyte String](https://www.php.net/manual/en/book.mbstring.php) extensions installed.
 
diff --git a/composer.json b/composer.json
index b39a7cd9..357c0197 100644
--- a/composer.json
+++ b/composer.json
@@ -22,7 +22,7 @@
         }
     ],
     "require": {
-        "php": "~8.1.0 || ~8.2.0",
+        "php": "~8.2.0 || ~8.3.0",
         "ext-dom": "*",
         "ext-iconv": "*",
         "ext-imap": "*",
@@ -30,12 +30,12 @@
         "ext-mbstring": "*"
     },
     "require-dev": {
-        "friendsofphp/php-cs-fixer": "^3.26.1",
-        "laminas/laminas-mail": "^2.23.0",
-        "phpstan/phpstan": "^1.10.33",
-        "phpstan/phpstan-phpunit": "^1.3.14",
-        "phpstan/phpstan-strict-rules": "^1.5.1",
-        "phpunit/phpunit": "^10.3.3"
+        "friendsofphp/php-cs-fixer": "^3.38.2",
+        "laminas/laminas-mail": "^2.25.1",
+        "phpstan/phpstan": "^1.10.43",
+        "phpstan/phpstan-phpunit": "^1.3.15",
+        "phpstan/phpstan-strict-rules": "^1.5.2",
+        "phpunit/phpunit": "^10.4.2"
     },
     "autoload": {
         "psr-4": {