diff --git a/README.md b/README.md
index ab97b88..eeb2c00 100644
--- a/README.md
+++ b/README.md
@@ -26,3 +26,9 @@ This repository is an implementation of the PSR-7 interfaces for use within PHP.
 </a>
 
 [fig]: https://www.php-fig.org/psr/psr-7/
+
+# 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/)