diff --git a/.prettierrc b/.prettierrc
new file mode 100644
index 00000000..b2095be8
--- /dev/null
+++ b/.prettierrc
@@ -0,0 +1,4 @@
+{
+  "semi": false,
+  "singleQuote": true
+}
diff --git a/README.md b/README.md
index 6abb5174..72e2e75f 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,6 @@
 [![NPM Downloads](https://img.shields.io/npm/dm/bundlesize.svg?style=flat)](https://www.npmjs.com/package/bundlesize)
  
 
-
 #### minimal setup
 
 ```sh
@@ -44,6 +43,7 @@ npx bundlesize
  
 
 #### 1) Add the path and maxSize in your `package.json`.
+
 By default the gzipped size is tested. You can use the `compression` option to change this. (`gzip`, `brotli`, or `none`).
 
 ```json
@@ -59,6 +59,19 @@ By default the gzipped size is tested. You can use the `compression` option to c
 }
 ```
 
+You can also keep the config in a separate file as well. Create a `bundlesize.config.json` in your project root in a `config` folder.
+
+```json
+{
+  "files": [
+    {
+      "path": "./dist.js",
+      "maxSize": "3 kB"
+    }
+  ]
+}
+```
+
 `bundlesize` also supports [glob patterns](https://github.com/isaacs/node-glob)
 
 Example:
@@ -91,14 +104,14 @@ Currently works for [Travis CI](https://travis-ci.org), [CircleCI](https://circl
 - Add this token as `BUNDLESIZE_GITHUB_TOKEN` as environment parameter in your CIs project settings.
 
 Using a different CI? You will need to supply an additional 4 environment variables.
-- `CI_REPO_OWNER` given the repo  `https://github.com/myusername/myrepo` would be `myusername`
+
+- `CI_REPO_OWNER` given the repo `https://github.com/myusername/myrepo` would be `myusername`
 - `CI_REPO_NAME` given the repo `https://github.com/myusername/myrepo` would be `myrepo`
 - `CI_COMMIT_MESSAGE` the commit message
 - `CI_COMMIT_SHA` the SHA of the CI commit, in [Jenkins](https://jenkins.io/) you would use `${env.GIT_COMMIT}`
 
 (Ask me for help if you're stuck)
 
-
  
 
 #### CLI
@@ -156,7 +169,7 @@ For more granular configuration, we recommend configuring it in the `package.jso
 
 #### TODO
 
-- Work with other CI tools 
+- Work with other CI tools
   - [AppVeyor](https://www.appveyor.com/) ([#234](https://github.com/siddharthkp/bundlesize/issues/234))
 - Automate setup (setting env_var)
 
diff --git a/examples/bundlesize.config.json b/examples/bundlesize.config.json
new file mode 100644
index 00000000..62787d20
--- /dev/null
+++ b/examples/bundlesize.config.json
@@ -0,0 +1,16 @@
+{
+  "files": [
+    {
+      "path": "./build/direct-path.js",
+      "maxSize": "50Kb"
+    },
+    {
+      "path": "./dist/generated-file-chunk-*.js",
+      "maxSize": "50Kb"
+    },
+    {
+      "path": "./dist/all-files-in-folder/**/*.js",
+      "maxSize": "50Kb"
+    }
+  ]
+}
diff --git a/examples/package.json b/examples/package.json
new file mode 100644
index 00000000..11120ced
--- /dev/null
+++ b/examples/package.json
@@ -0,0 +1,25 @@
+{
+  "name": "your-project",
+  "version": "1.0.0",
+  "scripts": {
+    "test": "bundlesize"
+  },
+  "bundlesize": [
+    {
+      "path": "./index.js",
+      "maxSize": "600B"
+    },
+    {
+      "path": "./src/files.js",
+      "maxSize": "600B"
+    },
+    {
+      "path": "./src/compressed-size.js",
+      "maxSize": "420B",
+      "compression": "none"
+    }
+  ],
+  "devDependencies": {
+    "bundlesize": "^0.18.0"
+  }
+}
diff --git a/package.json b/package.json
index 4bc0d298..e582f393 100644
--- a/package.json
+++ b/package.json
@@ -40,11 +40,11 @@
     "bytes": "^3.1.0",
     "ci-env": "^1.4.0",
     "commander": "^2.20.0",
+    "cosmiconfig": "^5.2.1",
     "github-build": "^1.2.0",
     "glob": "^7.1.4",
     "gzip-size": "^4.0.0",
-    "prettycli": "^1.4.3",
-    "read-pkg-up": "^3.0.0"
+    "prettycli": "^1.4.3"
   },
   "bundlesize": [
     {
diff --git a/src/config.js b/src/config.js
index ad6c87b1..92d1daee 100644
--- a/src/config.js
+++ b/src/config.js
@@ -1,12 +1,23 @@
-const readPkgUp = require('read-pkg-up')
+const cosmiconfig = require('cosmiconfig')
 
-const pkg = readPkgUp.sync().pkg
 const program = require('commander')
 const { error } = require('prettycli')
 const debug = require('./debug')
 
-/* Config from package.json */
-const packageJSONconfig = pkg.bundlesize
+/* Config from file */
+
+let fileConfig
+
+const explorer = cosmiconfig('bundlesize', {
+  searchPlaces: ['package.json', 'bundlesize.config.json', 'config/bundlesize.config.json']
+})
+
+const result = explorer.searchSync()
+
+if (result) {
+  if (result.filepath.includes('package.json')) fileConfig = result.config
+  else fileConfig = result.config.files
+}
 
 /* Config from CLI */
 
@@ -14,10 +25,7 @@ program
   .option('-f, --files [files]', 'files to test against (dist/*.js)')
   .option('-s, --max-size [maxSize]', 'maximum size threshold (3Kb)')
   .option('--debug', 'run in debug mode')
-  .option(
-    '-c, --compression [compression]',
-    'specify which compression algorithm to use'
-  )
+  .option('-c, --compression [compression]', 'specify which compression algorithm to use')
   .parse(process.argv)
 
 let cliConfig
@@ -34,7 +42,7 @@ if (program.files) {
 
 /* Send to readme if no configuration is provided */
 
-if (!packageJSONconfig && !cliConfig) {
+if (!fileConfig && !cliConfig) {
   error(
     `Config not found.
 
@@ -45,10 +53,10 @@ if (!packageJSONconfig && !cliConfig) {
   )
 }
 
-const config = cliConfig || packageJSONconfig
+const config = cliConfig || fileConfig
 
 debug('cli config', cliConfig)
-debug('package json config', packageJSONconfig)
+debug('file config', fileConfig)
 debug('selected config', config)
 
 module.exports = config