diff --git a/README.md b/README.md
index 668039a..0f0007e 100644
--- a/README.md
+++ b/README.md
@@ -41,3 +41,9 @@ else {
 	AuthenticationSystem::beginLogin($session->getStore("auth"));
 }
 ```
+
+# Proudly sponsored by
+
+[JetBrains Open Source sponsorship program](https://www.jetbrains.com/community/opensource/)
+
+[![JetBrains logo.](https://resources.jetbrains.com/storage/products/company/brand/logos/jetbrains.svg)](https://www.jetbrains.com/community/opensource/)
diff --git a/src/SessionSetup.php b/src/SessionSetup.php
index c548a9f..639fd0f 100644
--- a/src/SessionSetup.php
+++ b/src/SessionSetup.php
@@ -6,7 +6,7 @@
 use SessionHandlerInterface;
 
 class SessionSetup {
-	public static function attachHandler(
+	public function attachHandler(
 		string $handlerClass = SessionHandler::class
 	):SessionHandlerInterface {
 // Ensure class name is fully qualified.
diff --git a/src/SessionStoreFactory.php b/src/SessionStoreFactory.php
index 7e6aeb3..aaf6da0 100644
--- a/src/SessionStoreFactory.php
+++ b/src/SessionStoreFactory.php
@@ -2,7 +2,7 @@
 namespace Gt\Session;
 
 class SessionStoreFactory {
-	public static function create(
+	public function create(
 		string $namespace,
 		Session $session,
 	):SessionStore {