diff --git a/core/archive.cpp b/core/archive.cpp
index a1f8b76..08b12c8 100644
--- a/core/archive.cpp
+++ b/core/archive.cpp
@@ -58,7 +58,7 @@ void Core::Archive::open(const QString& account)
         }
         
         mdb_env_set_maxdbs(environment, 5);
-        mdb_env_set_mapsize(environment, 512UL * 1024UL * 1024UL);
+        mdb_env_set_mapsize(environment, 16UL * 1024UL * 1024UL);
         mdb_env_open(environment, path.toStdString().c_str(), 0, 0664);
         
         MDB_txn *txn;