diff --git a/packages/koa-shopify-auth/CHANGELOG.md b/packages/koa-shopify-auth/CHANGELOG.md
index 2a16d50ca2..4b0892ee9a 100644
--- a/packages/koa-shopify-auth/CHANGELOG.md
+++ b/packages/koa-shopify-auth/CHANGELOG.md
@@ -5,7 +5,9 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
-<!-- ## [Unreleased] -->
+## [Unreleased]
+
+- URI encode `config` on redirection page [1612](https://github.com/Shopify/quilt/pull/1612)
 
 ## [3.1.65] - 2020-07-06
 
diff --git a/packages/koa-shopify-auth/src/auth/redirection-page.ts b/packages/koa-shopify-auth/src/auth/redirection-page.ts
index 70908b89b5..658f32fbd0 100644
--- a/packages/koa-shopify-auth/src/auth/redirection-page.ts
+++ b/packages/koa-shopify-auth/src/auth/redirection-page.ts
@@ -12,7 +12,7 @@ export default function redirectionScript({origin, redirectTo, apiKey}) {
           var Redirect = AppBridge.actions.Redirect;
           var app = createApp({
             apiKey: '${apiKey}',
-            shopOrigin: '${origin}',
+            shopOrigin: '${encodeURI(origin)}',
           });
           var redirect = Redirect.create(app);
           redirect.dispatch(Redirect.Action.REMOTE, '${redirectTo}');