diff --git a/backend/lumens.ts b/backend/lumens.ts
index b7f24df2..25b030c1 100644
--- a/backend/lumens.ts
+++ b/backend/lumens.ts
@@ -18,6 +18,10 @@ export async function v1Handler(_: any, res: Response, next: NextFunction) {
   try {
     const cachedData = await getOrThrow(redisClient, "lumensV1");
     const obj: CachedData = JSON.parse(cachedData);
+    res.setHeader(
+      "Cache-Control",
+      "public, max-age=300, stale-while-revalidate=600",
+    );
     res.json(obj);
   } catch (e) {
     next(e);
diff --git a/test/tests/integration/backend.ts b/test/tests/integration/backend.ts
index 36f85341..e0bce6a6 100644
--- a/test/tests/integration/backend.ts
+++ b/test/tests/integration/backend.ts
@@ -18,7 +18,17 @@ describe("integration", function () {
 
   describe("backend api endpoints", function () {
     it("/api/lumens should return successfuly with data", async function () {
-      let { body } = await request(app).get("/api/lumens").expect(200);
+      let { body, headers } = await request(app)
+        .get("/api/lumens")
+        .expect(200)
+        .expect(
+          "Cache-Control",
+          "public, max-age=300, stale-while-revalidate=600",
+        );
+
+      chai
+        .expect(headers["cache-control"])
+        .to.include("public, max-age=300, stale-while-revalidate=600");
 
       chai.expect(body).to.be.an("object");
       chai.expect(Object.keys(body).length).to.not.equal(0);