diff --git a/bindings/python/notmuch/version.py b/bindings/python/notmuch/version.py
index 1bbd9464..903dbb04 100644
--- a/bindings/python/notmuch/version.py
+++ b/bindings/python/notmuch/version.py
@@ -1,3 +1,3 @@
 # this file should be kept in sync with ../../../version
 __VERSION__ = '0.24'
-SOVERSION = '4'
+SOVERSION = '5'