diff --git a/CHANGELOG.md b/CHANGELOG.md
index c37efaf..d879dec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+## v0.5.12 (2017-04-18)
+- Bump bundled capnp version to v0.5.3.1
+
 ## v0.5.11 (2017-04-10)
 - Make enums hashable (thanks to @madeleine-empirical)
 - Rework logic on when to build bundled libcapnp. Fixes cross-compilation (thanks to @benizl)
diff --git a/setup.py b/setup.py
index 495a228..cd6daaa 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@ _this_dir = os.path.dirname(__file__)
 
 MAJOR = 0
 MINOR = 5
-MICRO = 11
+MICRO = 12
 VERSION = '%d.%d.%d' % (MAJOR, MINOR, MICRO)