diff --git a/optipng-0.7.4.tar.gz b/optipng-0.7.4.tar.gz
deleted file mode 100644
index 7fd58cb..0000000
Binary files a/optipng-0.7.4.tar.gz and /dev/null differ
diff --git a/optipng-0.7.7.tar.gz b/optipng-0.7.7.tar.gz
new file mode 100644
index 0000000..a07d868
Binary files /dev/null and b/optipng-0.7.7.tar.gz differ
diff --git a/optipng.spec b/optipng.spec
index 4072232..85f3b91 100644
--- a/optipng.spec
+++ b/optipng.spec
@@ -1,14 +1,13 @@
 Name:           optipng
-Version:        0.7.4
+Version:        0.7.7
 Release:        1
 Summary:        PNG optimizer and converter
 
-Group:          Applications/Multimedia
 License:        zlib
 URL:            http://optipng.sourceforge.net/
 Source0:        http://downloads.sourceforge.net/optipng/%{name}-%{version}.tar.gz
-BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
+BuildRequires:  gcc
 BuildRequires:  zlib-devel libpng-devel
 
 %description
@@ -20,7 +19,9 @@ and corrections.
 
 %prep
 %setup -q
-f=AUTHORS.txt ; iconv -f iso-8859-1 -t utf-8 $f > $f.utf8 ; mv $f.utf8 $f
+for f in AUTHORS.txt doc/history.txt ; do
+    iconv -f iso-8859-1 -t utf-8 $f > $f.utf8 ; mv $f.utf8 $f
+done
 
 # Ensure system libs and headers are used; as of 0.6.3 pngxtern will use
 # the bundled headers if present even with -with-system-*, causing failures.
@@ -28,32 +29,33 @@ rm -rf src/libpng src/zlib
 
 
 %build
+%set_build_flags
 ./configure -prefix=%{_prefix} -mandir=%{_mandir} \
     -with-system-zlib -with-system-libpng
-make %{?_smp_mflags} CFLAGS="$RPM_OPT_FLAGS" LDFLAGS="$RPM_LD_FLAGS"
+%make_build
 
 
 %install
 rm -rf $RPM_BUILD_ROOT
-make install DESTDIR=$RPM_BUILD_ROOT
+%make_install
 chmod -c 755 $RPM_BUILD_ROOT%{_bindir}/optipng
 
 
 %check
-make test CFLAGS="$RPM_OPT_FLAGS" LDFLAGS="$RPM_LD_FLAGS"
-
-
-%clean
-rm -rf $RPM_BUILD_ROOT
+%__make test
 
 
 %files
-%defattr(-,root,root,-)
-%doc AUTHORS.txt README.txt LICENSE.txt doc/*
+%{!?_licensedir:%global license %%doc}
+%license LICENSE.txt
+%doc AUTHORS.txt README.txt doc/*
 %{_bindir}/optipng
 %{_mandir}/man1/optipng.1*
 
 
 %changelog
-* Thu May 06 2021 wulei <wulei80@huawei.com> 0.7.4 - 1 
-- Initial package
\ No newline at end of file
+* Tue Jun 8 2021 wutao <wutao61@huawei.com> - 0.7.7-1
+- upgrade to 0.7.7 to fix CVE-2016-3981 CVE-2016-3982
+
+* Thu May 06 2021 wulei <wulei80@huawei.com> 0.7.4 - 1
+- Initial package