diff --git a/javascript/ql/test/library-tests/Extend/package.json b/javascript/ql/test/library-tests/Extend/package.json
index b140801b8982..dd73e8e0a5ec 100644
--- a/javascript/ql/test/library-tests/Extend/package.json
+++ b/javascript/ql/test/library-tests/Extend/package.json
@@ -7,12 +7,11 @@
 		"deep-merge": "^1.0.0",
 		"deepmerge": "^2.1.1",
 		"defaults": "^1.0.3",
-		"defaults-deep": "^0.2.4",
 		"extend": "^3.0.2",
 		"extend-shallow": "^3.0.2",
 		"extend2": "^1.0.0",
 		"js-extend": "^1.0.1",
-		"just-extend": "^1.1.27",
+		"just-extend": "^4.0.0",
 		"lodash": "^4.17.10",
 		"lodash.defaultsdeep": "^4.6.0",
 		"lodash.mergewith": "^4.6.1",