diff --git a/README.md b/README.md
index 8f086c01..a27b3fc0 100644
--- a/README.md
+++ b/README.md
@@ -1526,7 +1526,7 @@ Table of Contents
   * [getawesomeness](https://getawesomeness.herokuapp.com) — Retrieve all amazing awesomeness from GitHub... a must see
   * [github.com — FOSS for Dev](https://github.com/tvvocold/FOSS-for-Dev) — A hub of free and Open Source software for developers.
   * [GitHub Education](https://education.github.com/pack) — Collection of free services for students. Registration required.
-  * [is-a.dev](https://is-a.dev) — Free `*.is-a.dev` subdomain for developers.
+  * [is-a.dev](https://www.is-a.dev/) — Free `*.is-a.dev` subdomain for developers.
   * [Microsoft 365 Developer Program](https://developer.microsoft.com/microsoft-365/dev-program) — Get a free sandbox, tools, and other resources you need to build solutions for the Microsoft 365 platform. The subscription is a 90-day [Microsoft 365 E5 Subscription](https://www.microsoft.com/microsoft-365/enterprise/e5) (Windows excluded) which is renewable. It is renewed if you're active in development(measured using telemetry data & algorithms).
   * [RedHat for Developers](https://developers.redhat.com) — Free access to Red Hat products including RHEL,OpenShift,CodeReady etc exclusively for developers. Individual plan only. Free e-Books also offered for reference.
   * [smsreceivefree.com](https://smsreceivefree.com/) — Provides free temporary and disposable phone numbers.