diff --git a/CHANGES.md b/CHANGES.md
index 6bdfdd6d7..0ffdf1aae 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,8 +1,16 @@
+Synapse 0.99.5.2 (2019-05-30)
+=============================
+
+Bugfixes
+--------
+
+- Fix bug where we leaked extremities when we soft failed events, leading to performance degradation. ([\#5274](https://github.com/matrix-org/synapse/issues/5274), [\#5278](https://github.com/matrix-org/synapse/issues/5278), [\#5291](https://github.com/matrix-org/synapse/issues/5291))
+
+
 Synapse 0.99.5.1 (2019-05-22)
 =============================
 
-No significant changes.
-
+0.99.5.1 supersedes 0.99.5 due to malformed debian changelog - no functional changes.
 
 Synapse 0.99.5 (2019-05-22)
 ===========================
diff --git a/debian/changelog b/debian/changelog
index 90c6b86c5..6a1a72c0e 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+matrix-synapse-py3 (0.99.5.2) stable; urgency=medium
+
+  * New synapse release 0.99.5.2.
+
+ -- Synapse Packaging team <packages@matrix.org>  Thu, 30 May 2019 16:28:07 +0100
+
 matrix-synapse-py3 (0.99.5.1) stable; urgency=medium
 
   * New synapse release 0.99.5.1.
diff --git a/synapse/__init__.py b/synapse/__init__.py
index 4f95778ee..d0e8d7c21 100644
--- a/synapse/__init__.py
+++ b/synapse/__init__.py
@@ -27,4 +27,4 @@ try:
 except ImportError:
     pass
 
-__version__ = "0.99.5.1"
+__version__ = "0.99.5.2"