diff --git a/immutables/_version.py b/immutables/_version.py
index 2296fca54..7eae57b21 100644
--- a/immutables/_version.py
+++ b/immutables/_version.py
@@ -10,4 +10,4 @@
 # supported platforms, publish the packages on PyPI, merge the PR
 # to the target branch, create a Git tag pointing to the commit.
 
-__version__ = '0.12'
+__version__ = '0.13'