diff --git a/CHANGELOG.md b/CHANGELOG.md
index 14669eb..f119e86 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,10 @@
+2.3.0
+=====
+
+* (feature) Add proper types for configurable bundle extension.
+* (internal) Update CI.
+
+
 2.2.0
 =====
 
diff --git a/src/Bundle/ConfigurableBundleExtension.php b/src/Bundle/ConfigurableBundleExtension.php
index 92ca58b..d4049b5 100644
--- a/src/Bundle/ConfigurableBundleExtension.php
+++ b/src/Bundle/ConfigurableBundleExtension.php
@@ -14,10 +14,11 @@ class ConfigurableBundleExtension extends BundleExtension
 {
 	private ConfigurationInterface $config;
 
-	/** @var callable */
+	/** @var callable(array, ContainerBuilder): void */
 	private $callback;
 
 	/**
+	 * @param callable(array, ContainerBuilder): void $callback
 	 */
 	public function __construct (
 		BundleInterface $bundle,