diff --git a/lib/notmuch.h b/lib/notmuch.h
index c0fa1768..15390610 100644
--- a/lib/notmuch.h
+++ b/lib/notmuch.h
@@ -58,7 +58,7 @@ NOTMUCH_BEGIN_DECLS
  * version in Makefile.local.
  */
 #define LIBNOTMUCH_MAJOR_VERSION        5
-#define LIBNOTMUCH_MINOR_VERSION        3
+#define LIBNOTMUCH_MINOR_VERSION        4
 #define LIBNOTMUCH_MICRO_VERSION        0