diff --git a/proton-c/bindings/python/setuputils/bundle.py b/proton-c/bindings/python/setuputils/bundle.py
index 2838477..b62b45c 100644
--- a/proton-c/bindings/python/setuputils/bundle.py
+++ b/proton-c/bindings/python/setuputils/bundle.py
@@ -35,7 +35,7 @@
 min_qpid_proton = (0, 12, 0)
 min_qpid_proton_str = "%i.%i.%i" % min_qpid_proton
 
-bundled_version = (0, 12, 2)
+bundled_version = (0, 12, 3)
 bundled_version_str = "%i.%i.%i" % bundled_version
 libqpid_proton = "qpid-proton-%s.tar.gz" % bundled_version_str
 libqpid_proton_url = ("http://www.apache.org/dist/qpid/proton/%s/%s" %