diff --git a/4.5.1.tar.gz b/4.5.1.tar.gz
new file mode 100644
index 0000000..f464c3e
Binary files /dev/null and b/4.5.1.tar.gz differ
diff --git a/generate-tarball.sh b/generate-tarball.sh
deleted file mode 100755
index 511bc4d..0000000
--- a/generate-tarball.sh
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/bin/bash
-set -e
-
-version=`grep Version: *spec | sed -e 's/Version:\s*\(.*\)/\1/'`
-
-
-wget https://github.com/java-native-access/jna/archive/${version}.tar.gz -O jna-${version}.tar.gz
-rm -rf jna-${version}
-tar xf jna-${version}.tar.gz
-#mv twall-jna-* jna-${version}
-# remove bundled things with unknown licensing
-rm -rvf jna-${version}/{dist/*,www,native/libffi}
-# jars in lib/native subdir need to be present in tarball so
-# that final jar can be built. They can be empty and then have no
-# effect on resulting jar. One jar (depending on architecture) will
-# be replaced with full content (containing libjnidispatch.so)
-for njar in jna-${version}/lib/native/*.jar; do
-    rm -v $njar
-    touch empty
-    jar cf $njar empty
-    rm -f empty
-done
-
-find jna-${version} -iname '*jar' -size +1b -delete
-find jna-${version} -name '*.class' -delete
-
-tar cf jna-${version}-clean.tar jna-${version}
-xz -9 jna-${version}-clean.tar
diff --git a/jna-4.5.1-clean.tar.xz b/jna-4.5.1-clean.tar.xz
deleted file mode 100644
index 2330963..0000000
Binary files a/jna-4.5.1-clean.tar.xz and /dev/null differ
diff --git a/jna.spec b/jna.spec
index 0453acc..fd21175 100644
--- a/jna.spec
+++ b/jna.spec
@@ -1,24 +1,31 @@
 Name:           jna
 Version:        4.5.1
-Release:        5
+Release:        6
 Summary:        Pure Java access to native libraries
 License:        (LGPLv2 or ASL 2.0) and ASL 2.0
 URL:            https://github.com/java-native-access/jna/
-Source0:        jna-%{version}-clean.tar.xz
+Source0:        https://github.com/java-native-access/jna/archive/4.5.1.tar.gz
+# Package list for prebuild
 Source1:        package-list
-Source2:        generate-tarball.sh
-
+# Add RPM_LD_FLAGS for adapt build
 Patch0000:      0001-Adapt-build.patch
+# MODIFIED FROM UPSTREAM - we rip out all sorts of gunk here that is
+# unnecessary when JNA is properly installed with the OS.
 Patch0001:      0002-Load-system-library.patch
+# The X11 tests currently segfault; overall I think the X11 JNA stuff is just a
+# Really Bad Idea, for relying on AWT internals, using the X11 API at all,
+# and using a complex API like X11 through JNA just increases the potential
+# for problems.
 Patch0002:      0003-Tests-headless.patch
+# Adds --allow-script-in-comments arg to javadoc to avoid error
 Patch0003:      0004-Fix-javadoc-build.patch
+# Avoid generating duplicate manifest entry
 Patch0004:      0005-Fix-duplicate-manifest-entry.patch
+# Remove Werror flag for build
 Patch0005:      0006-Remove-Werror.patch
-
 BuildRequires:  make javapackages-local libffi-devel ant ant-junit
 BuildRequires:  junit libX11-devel libXt-devel reflections
 Requires:       libffi
-
 Provides:       jna-contrib = %{version}-%{release}
 Obsoletes:      jna-contrib < %{version}-%{release}
 
@@ -68,5 +75,8 @@ install -D -m 755 build/native*/libjnidispatch.so %{buildroot}%{_libdir}/jna/lib
 %doc README.md CHANGES.md
 
 %changelog
+* Tue Mar 3 2020 chenli <chenli147@huawei.com> - 4.5.1-6
+- Fixed URL
+
 * Fri Nov 22 2019 sunguoshuai <sunguoshuai@huawei.com> - 4.5.1-5
 - Package init.