diff --git a/src/cdn/getUrlContents.ts b/src/cdn/getUrlContents.ts
index 6715394..c12b478 100644
--- a/src/cdn/getUrlContents.ts
+++ b/src/cdn/getUrlContents.ts
@@ -1,5 +1,7 @@
 import * as http from 'http';
 
+const MAX_MEMORY_SIZE = 100 * 1024 * 1024;
+
 export default function getUrlContents({ host, path }: {host: string, path: string}): Promise<ArrayBuffer> {
   return new Promise((resolve, reject) => {
     const request = http.request({
@@ -11,6 +13,11 @@ export default function getUrlContents({ host, path }: {host: string, path: stri
         return reject(`Expected status code 200 but received ${response.statusCode}`);
       }
       const headerLength = Number(response.headers['content-length']);
+      if (headerLength > MAX_MEMORY_SIZE) {
+        reject('File size too large to be handled in memory.');
+        request.abort();
+        return;
+      }
 
       const chunkList: Buffer[] = [];
       let totalLength = 0;