diff --git a/doc/HISTORY.md b/doc/HISTORY.md
index e6ccc88..2e29497 100644
--- a/doc/HISTORY.md
+++ b/doc/HISTORY.md
@@ -1,4 +1,9 @@
+## 0.5.1
+
+* makes worldFolder option optional
+
 ## 0.5.0
+
 * improve ticks performance a bit
 * add /summonMany
 * load/save the seed
diff --git a/package.json b/package.json
index 949cd0e..85e8e3b 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "flying-squid",
   "description": "A minecraft server written in node.js",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "main": "index.js",
   "author": "mhsjlw <mhsjlw@aol.com>",
   "contributors": [