diff --git a/api/validPetPoses.js b/api/validPetPoses.js
index 027caea..dba5f1c 100644
--- a/api/validPetPoses.js
+++ b/api/validPetPoses.js
@@ -2,5 +2,10 @@ import getValidPetPoses from "../src/server/getValidPetPoses";
 
 export default async (req, res) => {
   const buffer = await getValidPetPoses();
+
+  // Cache for 1 hour. This will also cache at Vercel's CDN, so the function
+  // shouldn't even get run very often at all!
+  res.setHeader("Cache-Control", "max-age=3600");
+
   res.status(200).send(buffer);
 };