diff --git a/perl-threads.spec b/perl-threads.spec
index bde9b67..9537712 100644
--- a/perl-threads.spec
+++ b/perl-threads.spec
@@ -1,12 +1,11 @@
 Name:           perl-threads
-Epoch:          1
-Version:        2.22
-Release:        419
+Epoch:          2
+Version:        2.21
+Release:        1
 Summary:        Perl interpreter-based threads
 License:        GPL+ or Artistic
 URL:            https://metacpan.org/release/threads
-#This is a devel version
-Source0:        https://cpan.metacpan.org/authors/id/R/RU/RURBAN/threads-2.22_01.tar.gz
+Source0:        https://cpan.metacpan.org/authors/id/J/JD/JDHEDDEN/%{name}-%{version}.tar.gz#/threads-2.21.tar.gz
 BuildRequires:  perl-devel perl-generators perl-interpreter
 BuildRequires:  perl(ExtUtils::MakeMaker) >= 6.76 perl(ExtUtils::testlib) perl(Test::More)
 Requires:       perl(:MODULE_COMPAT_%(eval "`perl -V:version`"; echo $version))
@@ -30,7 +29,7 @@ Requires:	man
 The %{name}-help package contains doc files for %{name}.
 
 %prep
-%autosetup -n threads-2.22_01
+%autosetup -n threads-%{version}
 chmod -x examples/*
 
 %build
@@ -54,6 +53,12 @@ make test
 %{_mandir}/man3/*
 
 %changelog
+* Fri Jul 24 2020 shenyangyang <shenyangyang4@huawei.com> - 2:2.21-1
+- Type: enhancement
+- ID: NA
+- SUG: NA
+- DESC: downgrade to stable version
+
 * Tue Sep 27 2019 luhuaxin <luhuaxin@huawei.com> - 1:2.22-419
 - Type: enhancement
 - ID: NA
diff --git a/threads-2.21.tar.gz b/threads-2.21.tar.gz
new file mode 100644
index 0000000..dee1c39
Binary files /dev/null and b/threads-2.21.tar.gz differ
diff --git a/threads-2.22_01.tar.gz b/threads-2.22_01.tar.gz
deleted file mode 100644
index c7fbeda..0000000
Binary files a/threads-2.22_01.tar.gz and /dev/null differ