diff --git a/src/Plugin.php b/src/Plugin.php
index 48c874d..2716938 100644
--- a/src/Plugin.php
+++ b/src/Plugin.php
@@ -27,7 +27,7 @@ class Plugin extends Container {
 
 		$laps = $this;
 
-		$laps['mustache'] = function () {
+		$laps['mustache'] = function (): \Mustache_Engine {
 			return new \Mustache_Engine( [
 				'loader' => new \Mustache_Loader_FilesystemLoader( dirname( __DIR__ ) . '/src/mustache' ),
 				'cache'  => new Mustache_Cache_FrozenCache( dirname( __DIR__ ) . '/src/mustache/cache' ),
diff --git a/src/Provider/Hook_Event_Provider.php b/src/Provider/Hook_Event_Provider.php
index 2d63caf..81da080 100644
--- a/src/Provider/Hook_Event_Provider.php
+++ b/src/Provider/Hook_Event_Provider.php
@@ -21,7 +21,7 @@ class Hook_Event_Provider implements ServiceProviderInterface {
 	 */
 	public function register( Container $pimple ): void {
 
-		$pimple['hook.events'] = function () {
+		$pimple['hook.events'] = function (): array {
 			return [
 				'core'    => new Core_Events(),
 				'genesis' => new Genesis_Events(),
diff --git a/src/Provider/Manager_Provider.php b/src/Provider/Manager_Provider.php
index f703225..78d4b2d 100644
--- a/src/Provider/Manager_Provider.php
+++ b/src/Provider/Manager_Provider.php
@@ -20,7 +20,7 @@ class Manager_Provider implements ServiceProviderInterface, Bootable_Provider_In
 	 */
 	public function register( Container $pimple ): void {
 
-		$pimple['managers'] = function ( Plugin $laps ) {
+		$pimple['managers'] = function ( Plugin $laps ): array {
 			return [
 				new Load_Order_Manager(),
 				new Asset_Manager(),
diff --git a/src/Provider/Record_Provider.php b/src/Provider/Record_Provider.php
index 4f6b779..03c23bb 100644
--- a/src/Provider/Record_Provider.php
+++ b/src/Provider/Record_Provider.php
@@ -23,11 +23,11 @@ class Record_Provider implements ServiceProviderInterface, Bootable_Provider_Int
 	 */
 	public function register( Container $pimple ): void {
 
-		$pimple['stopwatch'] = $pimple->factory( function () {
+		$pimple['stopwatch'] = $pimple->factory( function (): Stopwatch {
 			return new Stopwatch( true );
 		} );
 
-		$pimple['collectors'] = function ( Plugin $laps ) {
+		$pimple['collectors'] = function ( Plugin $laps ): array {
 			return [
 				'core' => new Core_Load_Collector(),
 				'hook' => new Hook_Record_Collector( $laps['stopwatch'], $laps['hook.events'] ),
@@ -36,7 +36,7 @@ class Record_Provider implements ServiceProviderInterface, Bootable_Provider_Int
 			];
 		};
 
-		$pimple['records'] = function ( Plugin $laps ) {
+		$pimple['records'] = function ( Plugin $laps ): array {
 
 			$records = [];