diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..f7b8104
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,13 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+    open-pull-requests-limit: 5
+  - package-ecosystem: composer
+    directory: /
+    schedule:
+      interval: monthly
+    open-pull-requests-limit: 5
+    versioning-strategy: widen
diff --git a/UPGRADE-3.0.md b/UPGRADE-3.0.md
new file mode 100644
index 0000000..ff43082
--- /dev/null
+++ b/UPGRADE-3.0.md
@@ -0,0 +1,4 @@
+# Upgrade from 2.x to 3.0
+
+- Minimum PHP is **8.2** (`^8.2`).
+- Requires `portphp/portphp` **^2.0**.
diff --git a/composer.json b/composer.json
index 7719973..1f99543 100644
--- a/composer.json
+++ b/composer.json
@@ -24,7 +24,7 @@
     },
     "require": {
         "php": "^8.2",
-        "portphp/portphp": "^1.6.0"
+        "portphp/portphp": "^2.0"
     },
     "autoload": {
         "psr-4": {
@@ -32,7 +32,7 @@
         }
     },
     "require-dev": {
-        "phpunit/phpunit": "^9.5"
+        "phpunit/phpunit": "^9.6"
     },
     "autoload-dev": {
         "psr-4": {
@@ -41,7 +41,7 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "2.0.x-dev"
+            "dev-master": "3.0.x-dev"
         }
     }
 }
diff --git a/src/CsvReaderFactory.php b/src/CsvReaderFactory.php
index f985c30..abc56ca 100644
--- a/src/CsvReaderFactory.php
+++ b/src/CsvReaderFactory.php
@@ -2,6 +2,7 @@
 
 namespace Port\Csv;
 
+use Port\Reader;
 use Port\Reader\ReaderFactory;
 
 /**
@@ -62,7 +63,7 @@ public function __construct(
      *
      * @return CsvReader
      */
-    public function getReader(\SplFileObject $file)
+    public function getReader(\SplFileObject $file): Reader
     {
         $reader = new CsvReader($file, $this->delimiter, $this->enclosure, $this->escape);
 
diff --git a/src/CsvWriter.php b/src/CsvWriter.php
index 2766b69..fcdb8f5 100644
--- a/src/CsvWriter.php
+++ b/src/CsvWriter.php
@@ -53,7 +53,7 @@ public function __construct($delimiter = ',', $enclosure = '"', $stream = null,
     /**
      * {@inheritdoc}
      */
-    public function prepare()
+    public function prepare(): void
     {
         if ($this->utf8Encoding) {
             fprintf($this->getStream(), chr(0xEF) . chr(0xBB) . chr(0xBF));
@@ -63,7 +63,7 @@ public function prepare()
     /**
      * {@inheritdoc}
      */
-    public function writeItem(array $item)
+    public function writeItem(array $item): void
     {
         if ($this->prependHeaderRow && 1 == $this->row++) {
             $headers = array_keys($item);