diff --git a/package.json b/package.json
index 78bbb5b4c6..2c4d0144d4 100644
--- a/package.json
+++ b/package.json
@@ -81,6 +81,7 @@
     "linkifyjs": "^2.1.6",
     "lodash": "^4.17.14",
     "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#develop",
+    "minimist": "^1.2.0",
     "pako": "^1.0.5",
     "png-chunks-extract": "^1.0.0",
     "prop-types": "^15.5.8",
diff --git a/scripts/reskindex.js b/scripts/reskindex.js
index 3919295078..81ab111f46 100755
--- a/scripts/reskindex.js
+++ b/scripts/reskindex.js
@@ -2,7 +2,7 @@
 var fs = require('fs');
 var path = require('path');
 var glob = require('glob');
-var args = require('optimist').argv;
+var args = require('minimist')(process.argv);
 var chokidar = require('chokidar');
 
 var componentIndex = path.join('src', 'component-index.js');