diff --git a/package.json b/package.json
index a67558d..69758ef 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "adm-zip": "^0.4.4",
     "xml2js": "^0.4.4"
   },
-  "optionalDependencies": {
+  "peerDependencies": {
     "zipfile": "^0.5.0"
   },
   "engine": [