diff --git a/backend/src/common/cache.js b/backend/src/common/cache.js
index 013c16bc..c39a4b5d 100644
--- a/backend/src/common/cache.js
+++ b/backend/src/common/cache.js
@@ -31,7 +31,9 @@ const resolveCacheSeconds = ({ requested, def, min, max }) => {
 const setCacheHeaders = (res, cacheSeconds) => {
   res.setHeader(
     "Cache-Control",
-    `max-age=${cacheSeconds}, s-maxage=${cacheSeconds}, stale-while-revalidate=${CONSTANTS.ONE_DAY}`,
+    `max-age=${cacheSeconds}, ` +
+      `s-maxage=${cacheSeconds}, ` +
+      `stale-while-revalidate=${CONSTANTS.ONE_DAY}`,
   );
 };
 
diff --git a/backend/tests/gist.test.js b/backend/tests/gist.test.js
index 82c4b49f..4f81f64c 100644
--- a/backend/tests/gist.test.js
+++ b/backend/tests/gist.test.js
@@ -188,7 +188,9 @@ describe("Test /api/gist", () => {
     expect(res.setHeader).toBeCalledWith("Content-Type", "image/svg+xml");
     expect(res.setHeader).toBeCalledWith(
       "Cache-Control",
-      `max-age=${CONSTANTS.CARD_CACHE_SECONDS}, s-maxage=${CONSTANTS.CARD_CACHE_SECONDS}, stale-while-revalidate=${CONSTANTS.ONE_DAY}`,
+      `max-age=${CONSTANTS.CARD_CACHE_SECONDS}, ` +
+        `s-maxage=${CONSTANTS.CARD_CACHE_SECONDS}, ` +
+        `stale-while-revalidate=${CONSTANTS.ONE_DAY}`,
     );
   });
 });