diff --git a/nbdkit.spec b/nbdkit.spec
index 5cb9a44..f26cc27 100644
--- a/nbdkit.spec
+++ b/nbdkit.spec
@@ -50,7 +50,7 @@ ExclusiveArch:  x86_64
 %global source_directory 1.27-development
 
 Name:           nbdkit
-Version:        1.27.3
+Version:        1.27.4
 Release:        1%{?dist}
 Summary:        NBD server
 
@@ -1241,6 +1241,9 @@ export LIBGUESTFS_TRACE=1
 
 
 %changelog
+* Thu Aug 05 2021 Richard W.M. Jones <rjones@redhat.com> - 1.27.4-1
+- New upstream development version 1.27.4.
+
 * Fri Jul 23 2021 Richard W.M. Jones <rjones@redhat.com> - 1.27.3-1
 - New upstream development version 1.27.3.
 
diff --git a/sources b/sources
index 0ac40c4..f7f024c 100644
--- a/sources
+++ b/sources
@@ -1,2 +1,2 @@
-SHA512 (nbdkit-1.27.3.tar.gz) = 0c1197baf1f5d7012f48fe0d868d1fbc5a2373b0f7ff9256bef120fcee65a7b7cb1dcafb080c644fc5b407f5e57ff38cfaea1f1a3500eed987dc3320bd693cfb
-SHA512 (nbdkit-1.27.3.tar.gz.sig) = 1885a641dc52e9c85e1b1cf44281e0f2fb36da6b23323d07d60d88a2eb7a7edbf61717265dd76406fdb79ffae98deaa058b8f817dc13b1efcd0cff8d2bb684e0
+SHA512 (nbdkit-1.27.4.tar.gz) = 09fa39ebd226031f43dd3fe215df31e881de6fad085b46fb24ded6a1b7c8d56671cc1422554f94272f42fa45806859af7eda57a221ad4764a0d12eee0338302c
+SHA512 (nbdkit-1.27.4.tar.gz.sig) = 2971f404081b5bf08d029061945b69fc66a0264fb5a3e489b7c49a32e7b6c3cfc716a15797e70b802634611420165c45a9a5cc89986e51d3a18228e6a4172c2f