diff --git a/res/update.template b/res/update.template
index d604cec..e42b82a 100644
--- a/res/update.template
+++ b/res/update.template
@@ -17,4 +17,5 @@
 		</tags>
 		<maintainer>Christian Wolf</maintainer>
 		<targetplatform name="joomla" version="4[.].*"/>
+		$SUMS
 	</update>
diff --git a/scripts/create-release.sh b/scripts/create-release.sh
index 75914e1..97580bc 100755
--- a/scripts/create-release.sh
+++ b/scripts/create-release.sh
@@ -21,8 +21,11 @@ fi
 
 cp slt.tar.gz "$outname"
 
+sha=$(sha512sum slt.tar.gz | cut -d' ' -f1)
+
 export VERSION="$TOTRELEASE"
 export FORMAT='tar.gz'
 export DOWNLOAD_URL="\$DL_PREFIX/$filename"
+export SUMS="<sha512>$sha</sha512>"
 
 cat res/update.template | envsubst > "$xmlname"