diff --git a/oab-java.sh b/oab-java.sh
index d6ed97e..d777299 100755
--- a/oab-java.sh
+++ b/oab-java.sh
@@ -470,6 +470,9 @@ cd ${WORK_PATH}/ >> "$log" 2>&1
 git clone -b ${TAG} ${WORK_PATH}/srcs/${JAVA_UPSTREAM}.git src >> "$log" 2>&1 &
 pid=$!;progress $pid
 
+# Change prepare.sh to not download the files as we will do it here.
+sed -i '/^make.*get-orig-source$/d' src/prepare.sh
+
 # Cet the current Debian package version and package urgency
 DEB_VERSION=`head -n1 ${WORK_PATH}/src/debian/changelog | cut -d'(' -f2 | cut -d')' -f1 | cut -d'~' -f1`
 DEB_URGENCY=`head -n1 ${WORK_PATH}/src/debian/changelog | cut -d'=' -f2`
@@ -656,10 +659,10 @@ echo "Date: `date -R`"                    >> Release
 echo "Architectures: ${LSB_ARCH}"         >> Release
 echo "Components: restricted"             >> Release
 echo "Description: Local Java Repository" >> Release
-echo "MD5Sum:"                            >> Release
+echo "SHA512:"                            >> Release
 for PACKAGE in Packages*
 do
-    printf ' '`md5sum ${PACKAGE} | cut -d' ' -f1`" %16d ${PACKAGE}\n" `wc --bytes ${PACKAGE} | cut -d' ' -f1` >> Release
+    printf ' '`sha512sum ${PACKAGE} | cut -d' ' -f1`" %16d ${PACKAGE}\n" `wc --bytes ${PACKAGE} | cut -d' ' -f1` >> Release
 done
 cecho success
 
@@ -711,7 +714,7 @@ if [ -n "${BUILD_KEY}" ] || [ -e ${WORK_PATH}/gpg/pubring.gpg ] && [ -e ${WORK_P
     else
         GPG_OPTION=(--homedir ${WORK_PATH}/gpg)
     fi
-    gpg "${GPG_OPTION[@]}" --armor --detach-sign --output ${WORK_PATH}/deb/Release.gpg ${WORK_PATH}/deb/Release >> "$log" 2>&1 &
+    gpg "${GPG_OPTION[@]}" --digest-algo SHA512 --armor --detach-sign --output ${WORK_PATH}/deb/Release.gpg ${WORK_PATH}/deb/Release >> "$log" 2>&1 &
     pid=$!;progress $pid
 
     if [ -z "${BUILD_KEY}" ] ; then