diff --git a/README.md b/README.md
index 5963f61..d1d7655 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,10 @@ To install the package run:
 npm i @dabapps/django-s3-file-upload -S
 ```
 
+### Compatibility
+
+You will also need polyfills for both `Promises` and `Symbols` if you wish to target older browsers.
+
 ## Usage
 
 ### How it works
diff --git a/package-lock.json b/package-lock.json
index baa9b98..ccd6b24 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "@dabapps/django-s3-file-upload",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 8cb63b2..25490aa 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@dabapps/django-s3-file-upload",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "description": "Upload files from the browser to S3 - client side implementation",
   "main": "dist/index.js",
   "directories": {},
@@ -14,7 +14,7 @@
     "prettier-check": "prettier --check '**/*.{ts,tsx,js,jsx}'",
     "prettier": "prettier --write '**/*.{ts,tsx,js,jsx}'",
     "tests": "jest",
-    "test": "npm run lint && npm run typecheck && npm run tests -- --runInBand --coverage",
+    "test": "npm run dist && npm run lint && npm run typecheck && npm run tests -- --runInBand --coverage",
     "prepublishOnly": "npm run dist"
   },
   "repository": {
diff --git a/tsconfig.dist.json b/tsconfig.dist.json
index 0259696..c56f667 100644
--- a/tsconfig.dist.json
+++ b/tsconfig.dist.json
@@ -4,6 +4,13 @@
     "declaration": true,
     "sourceMap": true,
     "listEmittedFiles": true,
+    "target": "es5",
+    "lib": [
+      "es5",
+      "dom",
+      "es2015.promise",
+      "es2015.symbol"
+    ],
     "rootDir": "./src/",
     "outDir": "./dist/"
   },