diff --git a/HISTORY.md b/HISTORY.md
index 43025b722..9b014c1f2 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -1,6 +1,6 @@
 # Rocksdb Change Log
 
-## Unreleased (3.1.0)
+## 3.1.0 (05/21/2014)
 
 ### Public API changes
 * Replaced ColumnFamilyOptions::table_properties_collectors with ColumnFamilyOptions::table_properties_collector_factories