diff --git a/bison-3.6.4.tar.xz b/bison-3.6.4.tar.xz
deleted file mode 100644
index aa3eba7..0000000
Binary files a/bison-3.6.4.tar.xz and /dev/null differ
diff --git a/bison-3.7.3.tar.xz b/bison-3.7.3.tar.xz
new file mode 100644
index 0000000..2723801
Binary files /dev/null and b/bison-3.7.3.tar.xz differ
diff --git a/bison.spec b/bison.spec
index 16bb656..ea1aa63 100644
--- a/bison.spec
+++ b/bison.spec
@@ -1,5 +1,5 @@
 Name:           bison
-Version:        3.6.4
+Version:        3.7.3
 Release:        1
 Summary:        A GNU general-purpose parser generator
 License:        GPLv3+
@@ -89,6 +89,12 @@ fi
 %{_datadir}/locale/*/LC_MESSAGES/bison-gnulib.mo
 
 %changelog
+* Wed Oct 28 2020 wangchen <wangchen137@huawei.com> 3.7.3-1
+- Type:enhancement
+- ID:NA
+- SUG:NA
+- DESC:update to 3.7.3
+
 * Thu Jul 16 2020 wangchen <wangchen137@huawei.com> 3.6.4-1
 - Type:enhancement
 - ID:NA