diff --git a/src/server.tsx b/src/server.tsx
index d247eab..6f7849c 100644
--- a/src/server.tsx
+++ b/src/server.tsx
@@ -23,13 +23,15 @@ type Success = {
     subdomain: string
 }
 
+export const GIT_SHA = process.env.RENDER_GIT_COMMIT ?? (await Bun.$`git rev-parse HEAD`.text()).trim()
+
 type Connection = { app: string, ws: any }
 let connections: Record<string, Connection> = {}
 const pending = new Map<string, (res: any) => void>
 
 const app = new Hono
 
-app.get("/health", c => c.text("ok"))
+app.get("/health", c => c.text(GIT_SHA))
 
 app.get("/tunnels", c => {
     return c.html(<ul>