diff --git a/package.json b/package.json
index fbc7c67..8ee15d0 100644
--- a/package.json
+++ b/package.json
@@ -36,7 +36,7 @@
   },
   "homepage": "https://github.com/dssrv/cli",
   "devDependencies": {
-    "concat-stream": "1.6.0",
+    "concat-stream": "2.0.0",
     "coveralls-send": "0.0.2",
     "cross-spawn": "5.1.0",
     "documentjs": "0.5.1",