diff --git a/bindings/python/notmuch/version.py b/bindings/python/notmuch/version.py
index c847a1a3..af97e6d1 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__ = '0.38'
+__VERSION__ = '0.38.1~pre0'
 SOVERSION = '5'
diff --git a/version.txt b/version.txt
index 1cbc8125..cf30d88f 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-0.38
+0.38.1~pre0