diff --git a/CHANGES b/CHANGES
index 1ac8e6e..f751e04 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,10 @@
 Changelog
 =========
 
+0.3.1
+-----
+- Raise IntegrityError on unique constraint violation
+
 0.3.0
 -----
 - Added LOB_WRITE requests allowing to insert or update LOBs of arbitrary size
diff --git a/VERSION b/VERSION
index 0d91a54..9e11b32 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.3.0
+0.3.1