diff --git a/progtest/package.json b/progtest/package.json
index 8a5e57df..8e397815 100644
--- a/progtest/package.json
+++ b/progtest/package.json
@@ -9,7 +9,9 @@
       "js-yaml": "3.10.0"
   },
   "devDependencies": {
-      "browserify": "16.1.0"
+      "browserify": "16.1.0",
+      "mocha": "5.0.1",
+      "chai": "4.1.2"
   },
 
   "license": "GPL-3.0+"