diff --git a/package.json b/package.json
index 6443128..d1fd283 100644
--- a/package.json
+++ b/package.json
@@ -33,7 +33,7 @@
     "png-file-stream": "^1.0.0",
     "puppeteer": "^1.2.0",
     "tempdir": "^2.0.0",
-    "yargs": "^12.0.1"
+    "yargs": "^13.3.0"
   },
   "devDependencies": {
     "mocha": "^5.2.0",