diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index a92a97b..0263874 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@pushrocks/smartmongo',
-  version: '2.0.0',
+  version: '2.0.1',
   description: 'create a local mongodb for testing'
 }
diff --git a/ts/index.ts b/ts/index.ts
index 167eeb8..03cdf5b 100644
--- a/ts/index.ts
+++ b/ts/index.ts
@@ -18,7 +18,9 @@ export class SmartMongo {
   }
 
   public async start(countArg: number = 1) {
-    this.mongoReplicaSet = await plugins.mongoPlugin.MongoMemoryReplSet.create({ replSet: { count: countArg } });
+    this.mongoReplicaSet = await plugins.mongoPlugin.MongoMemoryReplSet.create({ replSet: { count: countArg }, instanceOpts: [{
+      storageEngine: 'wiredTiger'
+    }]});
     this._readyDeferred.resolve();
     console.log(`mongoReplicaSet with ${countArg} replicas started.`);
     console.log(`@pushrocks/smartmongo version ${commitinfo.version}`);