diff --git a/bin/cli.js b/bin/cli.js
index edc02d2..56044fc 100755
--- a/bin/cli.js
+++ b/bin/cli.js
@@ -4,22 +4,60 @@
 /**
  * Dependencies
  */
+const path = require('path');
 const chalk = require('chalk');
 const argv = require('yargs').argv;
 const replace = require('../lib/replace-in-file');
 
 //Verify arguments
-if (argv._.length < 3) {
+if (argv._.length < 3 && !argv.config) {
   console.error(chalk.red('Replace in file needs at least 3 arguments'));
   process.exit(1);
 }
 
-//Collect main arguments
-let from = argv._.shift();
-const to = argv._.shift();
+let from, to, files;
+
+// If --config is set, load config file
+if (argv.config) {
+  //Read config file
+  let config;
+  try {
+    config = require(path.join(process.cwd(), argv.config));
+  }
+  catch (e) {
+    console.error(chalk.red('Cannot load config file'));
+    console.error(e);
+    process.exit(1);
+  }
+  from = config.from;
+  to = config.to;
+  if (typeof config.files === 'string') {
+    config.files = [config.files];
+  }
+  files = config.files;
+}
+
+if (!from === undefined) {
+  from = argv._.shift();
+}
+if (!to === undefined) {
+  to = argv._.shift();
+}
+if (!files) {
+  files = argv._;
+}
+
+if (!from === undefined || !to === undefined) {
+  console.error(chalk.red('Must set from & to options'));
+  process.exit(1);
+}
+if (!files) {
+  console.error(chalk.red('Must pass a list of files'));
+  process.exit(1);
+}
 
 //Single star globs already get expanded in the command line
-const files = argv._.reduce((files, file) => {
+files = files.reduce((files, file) => {
   return files.concat(file.split(','));
 }, []);