diff --git a/README.md b/README.md
index e0a8014..0c531f0 100644
--- a/README.md
+++ b/README.md
@@ -2,14 +2,15 @@
 
 > Concatenate items from an iterator into an array.
 
-[![level badge][level-badge]](https://github.com/level/awesome)
-[![npm](https://img.shields.io/npm/v/level-concat-iterator.svg)](https://www.npmjs.com/package/level-concat-iterator)
-![Node version](https://img.shields.io/node/v/level-concat-iterator.svg)
-[![Travis](https://img.shields.io/travis/Level/concat-iterator.svg)](http://travis-ci.org/Level/concat-iterator)
-[![dependencies](https://david-dm.org/Level/level-concat-iterator.svg)](https://david-dm.org/level/level-concat-iterator)
+[![level badge][level-badge]](https://github.com/Level/awesome)
+[![npm](https://img.shields.io/npm/v/level-concat-iterator.svg?label=&logo=npm)](https://www.npmjs.com/package/level-concat-iterator)
+[![Node version](https://img.shields.io/node/v/level-concat-iterator.svg)](https://www.npmjs.com/package/level-concat-iterator)
+[![Travis](https://img.shields.io/travis/Level/concat-iterator.svg?logo=travis&label=)](https://travis-ci.org/Level/concat-iterator)
 [![Coverage Status](https://coveralls.io/repos/github/Level/concat-iterator/badge.svg)](https://coveralls.io/github/Level/concat-iterator)
 [![JavaScript Style Guide](https://img.shields.io/badge/code_style-standard-brightgreen.svg)](https://standardjs.com)
-[![npm](https://img.shields.io/npm/dm/level-concat-iterator.svg)](https://www.npmjs.com/package/level-concat-iterator)
+[![npm](https://img.shields.io/npm/dm/level-concat-iterator.svg?label=dl)](https://www.npmjs.com/package/level-concat-iterator)
+[![Backers on Open Collective](https://opencollective.com/level/backers/badge.svg?color=orange)](#backers)
+[![Sponsors on Open Collective](https://opencollective.com/level/sponsors/badge.svg?color=orange)](#sponsors)
 
 ## Usage
 
@@ -42,6 +43,18 @@ Takes an `abstract-leveldown` compatible `iterator` as first parameter and calls
 
 See the [Contribution Guide](https://github.com/Level/community/blob/master/CONTRIBUTING.md) for more details.
 
+## Donate
+
+To sustain [`Level`](https://github.com/Level) and its activities, become a backer or sponsor on [Open Collective](https://opencollective.com/level). Your logo or avatar will be displayed on our 28+ [GitHub repositories](https://github.com/Level), [npm](https://www.npmjs.com/) packages and (soon) [our website](http://leveldb.org). 💖
+
+### Backers
+
+[![Open Collective backers](https://opencollective.com/level/backers.svg?width=890)](https://opencollective.com/level)
+
+### Sponsors
+
+[![Open Collective sponsors](https://opencollective.com/level/sponsors.svg?width=890)](https://opencollective.com/level)
+
 ## License
 
 [MIT](LICENSE.md) © 2018-present [Contributors](CONTRIBUTORS.md).
diff --git a/package.json b/package.json
index 3691185..44e79d7 100644
--- a/package.json
+++ b/package.json
@@ -8,10 +8,13 @@
   "scripts": {
     "test": "standard && hallmark && nyc node test",
     "coverage": "nyc report --reporter=text-lcov | coveralls",
-    "hallmark": "hallmark --fix"
+    "hallmark": "hallmark --fix",
+    "dependency-check": "dependency-check . test.js",
+    "prepublishOnly": "npm run dependency-check"
   },
   "devDependencies": {
     "coveralls": "^3.0.2",
+    "dependency-check": "^3.3.0",
     "hallmark": "^0.1.0",
     "level-community": "^3.0.0",
     "nyc": "^12.0.2",