diff --git a/extlib-1.7.5.tar.gz b/extlib-1.7.5.tar.gz
deleted file mode 100644
index 8e0b595..0000000
Binary files a/extlib-1.7.5.tar.gz and /dev/null differ
diff --git a/extlib-1.7.8.tar.gz b/extlib-1.7.8.tar.gz
new file mode 100644
index 0000000..1c865a9
Binary files /dev/null and b/extlib-1.7.8.tar.gz differ
diff --git a/ocaml-extlib.spec b/ocaml-extlib.spec
index 5a4248b..7b755c3 100644
--- a/ocaml-extlib.spec
+++ b/ocaml-extlib.spec
@@ -1,8 +1,8 @@
 %global debug_package %{nil}
 
 Name:           ocaml-extlib
-Version:        1.7.5
-Release:        5
+Version:        1.7.8
+Release:        1
 Summary:        A set of additional useful functions and modules for OCaml
 License:        LGPLv2+ with exceptions
 URL:            https://github.com/ygrek/ocaml-extlib
@@ -30,6 +30,7 @@ that use %{name}.
 %autosetup -p1 -n extlib-%{version}
 
 %build
+# Parallel builds do not work.
 unset MAKEFLAGS
 make build -j1
 
@@ -48,6 +49,9 @@ install -d $OCAMLFIND_DESTDIR/stublibs
 %{_libdir}/ocaml/extlib/*.{a,cmx,cmxa,mli}
 
 %changelog
+* Fri Apr 15 2022 yaoxin <yaoxin30@h-partners.com> - 1.7.8-1
+- Upgrade ocaml-extlib to 1.7.8
+
 * Fri Jul 30 2021 chenyanpanHW <chenyanpan@huawei.com> - 1.7.5-5
 - DESC: delete -S git from %autosetup, and delete BuildRequires git