diff --git a/CHANGES.rst b/CHANGES.rst
index 3a2a30873..ff137f481 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,3 +1,13 @@
+Changes in synapse v0.31.1 (2018-06-08)
+=======================================
+
+This release fixes a security bug where event visibility rules were not
+applied correctly to ``get_missing_events``.
+
+Bug Fixes:
+
+ * Fix event filtering in get_missing_events handler (PR #3371)
+
 Changes in synapse v0.31.0 (2018-06-06)
 =======================================
 
diff --git a/synapse/__init__.py b/synapse/__init__.py
index ca113db43..78fc63aa4 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -16,4 +16,4 @@
 """ This is a reference implementation of a Matrix home server.
 """
 
-__version__ = "0.31.0"
+__version__ = "0.31.1"