diff --git a/package.json b/package.json
index 232171e..d0c4758 100644
--- a/package.json
+++ b/package.json
@@ -4,6 +4,7 @@
   "private": true,
   "dependencies": {
     "diff": "^4.0.1",
+    "js-base64": "^2.5.1",
     "netlify-auth-providers": "^1.0.0-alpha5",
     "prismjs": "^1.15.0",
     "react": "^16.8.1",
diff --git a/src/github.js b/src/github.js
index 2b06b23..cefee36 100644
--- a/src/github.js
+++ b/src/github.js
@@ -1,5 +1,6 @@
-import { getLanguageDependencies } from "./language-detector";
 import netlify from "netlify-auth-providers";
+import { Base64 } from "js-base64";
+import { getLanguageDependencies } from "./language-detector";
 const TOKEN_KEY = "github-token";
 
 function getHeaders() {
@@ -21,7 +22,7 @@ async function getContent(repo, sha, path) {
     throw contentResponse;
   }
   const contentJson = await contentResponse.json();
-  const content = window.atob(contentJson.content);
+  const content = Base64.decode(contentJson.content);
   return { content, url: contentJson.html_url };
 }
 
diff --git a/yarn.lock b/yarn.lock
index 21a43a1..67fc8bd 100755
--- a/yarn.lock
+++ b/yarn.lock
@@ -5595,6 +5595,11 @@ joi@^11.1.1:
     isemail "3.x.x"
     topo "2.x.x"
 
+js-base64@^2.5.1:
+  version "2.5.1"
+  resolved "https://registry.yarnpkg.com/js-base64/-/js-base64-2.5.1.tgz#1efa39ef2c5f7980bb1784ade4a8af2de3291121"
+  integrity sha512-M7kLczedRMYX4L8Mdh4MzyAMM9O5osx+4FcOQuTvr3A9F2D9S5JXheN0ewNbrvK2UatkTRhL5ejGmGSjNMiZuw==
+
 js-levenshtein@^1.1.3:
   version "1.1.4"
   resolved "https://registry.yarnpkg.com/js-levenshtein/-/js-levenshtein-1.1.4.tgz#3a56e3cbf589ca0081eb22cd9ba0b1290a16d26e"