diff --git a/package.json b/package.json
index e0c3101..bd743a7 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
     "type": "git",
     "url": "https://github.com/jaakkos/winston-logstash.git"
   },
-  "dependencies": {
+  "peerDependencies": {
     "winston": ">=0.7.2"
   },
   "devDependencies": {
@@ -58,4 +58,4 @@
       "email": "jaakko@suutarla.com"
     }
   ]
-}
\ No newline at end of file
+}