diff --git a/package.json b/package.json
index f07abfbb..a5f47536 100644
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
         "cluster": "0.6.4",
         "node-varnish": "0.1.1",
         "underscore"  : "1.1.x",
-        "grainstore"  : "~0.3.2",
+        "grainstore"  : "~0.5.0",
         "windshaft"  : "~0.4.12",
         "step": "0.0.x",
         "generic-pool": "1.0.x",