diff --git a/libguestfs.spec b/libguestfs.spec
index 0987a43..d04c47e 100644
--- a/libguestfs.spec
+++ b/libguestfs.spec
@@ -35,8 +35,8 @@
 Summary:       Access and modify virtual machine disk images
 Name:          libguestfs
 Epoch:         1
-Version:       1.37.20
-Release:       2%{?dist}
+Version:       1.37.21
+Release:       1%{?dist}
 License:       LGPLv2+
 
 # Source and patches.
@@ -1382,6 +1382,9 @@ install -m 0644 utils/boot-benchmark/boot-benchmark.1 $RPM_BUILD_ROOT%{_mandir}/
 
 
 %changelog
+* Wed Aug 09 2017 Richard W.M. Jones <rjones@redhat.com> - 1:1.37.21-1
+- New upstream version 1.37.21.
+
 * Tue Aug 08 2017 Richard W.M. Jones <rjones@redhat.com> - 1:1.37.20-2
 - OCaml 4.05.0 rebuild.
 
diff --git a/sources b/sources
index 3ac264b..dafd7ef 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (libguestfs-1.37.20.tar.gz) = 8073613f23280fa61784ea4e768ea358b4e5526fd1fb335ae729f403e42f6f902d2b265946395b9a09c2366d25a9501e9794d731971a1e4a26af6b759db5bd8e
+SHA512 (libguestfs-1.37.21.tar.gz) = ac4856605d7221e7566f272d6e2b9f007df0babdcdc84c8107c70a287e279a74acee1b7504040b691dc8d38a84b8161d56ac993db7da84c07fbe173b8b62212b