diff --git a/README.md b/README.md
index 20ae37cf..9b0eba0c 100644
--- a/README.md
+++ b/README.md
@@ -138,7 +138,7 @@ to add one — start with [Travis CI](https://github.com/dwyl/learn-travis).
 
 ## Config
 
-Size Limits supports 2 ways to define config.
+Size Limits supports 3 ways to define config.
 
 1. `size-limit` section to `package.json`:
 
@@ -162,6 +162,17 @@ Size Limits supports 2 ways to define config.
    ]
    ```
 
+3. or more flexible `.size-limit.js` config file:
+
+   ```js
+   module.exports = [
+     {
+       path: "index.js",
+       limit: "9 KB"
+     }
+   ]
+   ```
+
 Each section in config could have options:
 
 * **path**: relative paths to files. The only mandatory option.
diff --git a/cli.js b/cli.js
index 2e2eaf0b..379000e3 100755
--- a/cli.js
+++ b/cli.js
@@ -177,7 +177,7 @@ function getConfig () {
     searchPlaces: [
       'package.json',
       '.size-limit',
-      'size-limit.config.js'
+      '.size-limit.js'
     ]
   })
   return explorer
diff --git a/test/cli.test.js b/test/cli.test.js
index e3d2ddcc..e2982319 100644
--- a/test/cli.test.js
+++ b/test/cli.test.js
@@ -114,6 +114,17 @@ it('uses .size-limit file config', () => {
   })
 })
 
+it('uses .size-limit.js file config', () => {
+  return run([], { cwd: fixture('js') }).then(result => {
+    expect(result.out).toEqual('\n' +
+    '  Package size: 19 B\n' +
+    '  Size limit:   1 KB\n' +
+    '  With all dependencies, minified and gzipped\n' +
+    '\n')
+    expect(result.code).toEqual(0)
+  })
+})
+
 it('overrides config by limit argument', () => {
   return run(['--limit', '18B'], { cwd: fixture('config') }).then(result => {
     expect(result.out).toContain('Size limit:   18 B\n')
diff --git a/test/fixtures/js/.size-limit.js b/test/fixtures/js/.size-limit.js
new file mode 100644
index 00000000..4258896d
--- /dev/null
+++ b/test/fixtures/js/.size-limit.js
@@ -0,0 +1,6 @@
+module.exports = [
+  {
+    path: "index.js",
+    limit: "1 KB"
+  }
+]
diff --git a/test/fixtures/js/index.js b/test/fixtures/js/index.js
new file mode 100644
index 00000000..a37e6e10
--- /dev/null
+++ b/test/fixtures/js/index.js
@@ -0,0 +1,3 @@
+'use strict'
+
+console.log(2)