diff --git a/perl-Math-BigInt-FastCalc.spec b/perl-Math-BigInt-FastCalc.spec
index 9b3b637..91993ee 100644
--- a/perl-Math-BigInt-FastCalc.spec
+++ b/perl-Math-BigInt-FastCalc.spec
@@ -1,6 +1,6 @@
 Name:         perl-Math-BigInt-FastCalc
 Version:      0.500.900 
-Release:      1
+Release:      2
 Summary:      Math::BigInt::Calc with some XS for more speed
 License:      GPL+ or Artistic
 URL:          https://metacpan.org/release/Math-BigInt-FastCalc
@@ -8,7 +8,7 @@ Source0:      https://cpan.metacpan.org/authors/id/P/PJ/PJACKLAM/Math-BigInt-Fas
 
 BuildRequires:perl-generators perl-interpreter perl-devel
 BuildRequires:perl(ExtUtils::MakeMaker) >= 6.76 perl(Test::More) >= 0.88
-BuildRequires:perl(Math::BigInt) perl(Math::BigFloat)
+BuildRequires:perl(Math::BigInt) >= 1.999817 perl(Math::BigFloat)
 
 Requires:     perl(:MODULE_COMPAT_%(perl -V:version | cut -d"'" -f 2))
 Conflicts:    perl < 4:5.22.0-348
@@ -62,6 +62,9 @@ make test
 %{_mandir}/*/*
 
 %changelog
+* Wed Aug 5 2020 shixuantong <shixuantong@huawei.com> - 0.500.900-2 
+- add perl(Math::BigInt) >= 1.999817
+
 * Wed Jul 29 2020 shixuantong <shixuantong@huawei.com> - 0.500.900-1
 - update to 0.500.900-1