diff --git a/resources/version.sh b/resources/version.sh
index 45c62d3..71e5853 100755
--- a/resources/version.sh
+++ b/resources/version.sh
@@ -6,29 +6,40 @@ scriptDir=$(dirname "$(readlink -f "$0")")
 baseDir="$scriptDir/.."
 action="${1:-nothing}"
 
+# Escape strings in sed: https://stackoverflow.com/a/29613573
+quoteRe() { printf -- '%s' "$1" | sed -e 's/[^^]/[&]/g; s/\^/\\^/g; $!a'\\''"$(printf '\n')"'\\n' | tr -d '\n'; }
+quoteSubst() { printf -- '%s' "$1" | sed -e ':a' -e '$!{N;ba' -e '}' -e 's/[&/\]/\\&/g; s/\n/\\&/g'; }
+replaceLiteral() { sed -i -- "s/$(quoteRe "$1")/$(quoteSubst "$2")/g" "$3"; }
+
 version() {
 	jq -r '.version' "$baseDir/package.json"
 }
 
 checksum() {
-	sha256sum "$baseDir/hblock" | cut -c 1-64
-}
-
-replaceInFile() {
-	sed -i "s/$1/$2/g" "$3"
-}
-
-replaceLiteralInFile() {
-	replaceInFile \
-		"$(printf -- '%s' "$1" | sed 's/[]\/$*.^|[]/\\&/g')" \
-		"$(printf -- '%s' "$2" | sed 's/[&/\]/\\&/g')" \
-		"$3"
+	if [ "$action" = 'preversion' ]; then
+		cd "$baseDir" && git show "v$(version):$1" | sha256sum | cut -c 1-64
+	elif [ "$action" = 'version' ]; then
+		sha256sum "$baseDir/$1" | cut -c 1-64
+	fi
 }
 
 if [ "$action" = 'preversion' ]; then
-	replaceInFile '[A-Fa-f0-9]\{64\}\(.*shasum\)' '__CHECKSUM__\1' "$baseDir/README.md"
-	replaceLiteralInFile "$(version)" '__VERSION__' "$baseDir/hblock"
+	replaceLiteral "# Version:    $(version)" '# Version:    __VERSION__' "$baseDir/hblock"
+	replaceLiteral "'%s\\n' '$(version)'" "'%s\\n' '__VERSION__'" "$baseDir/hblock"
+
+	replaceLiteral "hblock/v$(version)/" 'hblock/v__VERSION__/' "$baseDir/README.md"
+	replaceLiteral "$(checksum hblock)" '__CHECKSUM_HBLOCK__' "$baseDir/README.md"
+
+	replaceLiteral "hblock/v$(version)/" 'hblock/v__VERSION__/' "$baseDir/resources/systemd/README.md"
+	replaceLiteral "$(checksum resources/systemd/hblock.service)" '__CHECKSUM_HBLOCK_SERVICE__' "$baseDir/resources/systemd/README.md"
+	replaceLiteral "$(checksum resources/systemd/hblock.timer)" '__CHECKSUM_HBLOCK_TIMER__' "$baseDir/resources/systemd/README.md"
 elif [ "$action" = 'version' ]; then
-	replaceLiteralInFile '__VERSION__' "$(version)" "$baseDir/hblock"
-	replaceLiteralInFile '__CHECKSUM__' "$(checksum)" "$baseDir/README.md"
+	replaceLiteral '__VERSION__' "$(version)" "$baseDir/hblock"
+
+	replaceLiteral '__VERSION__' "$(version)" "$baseDir/README.md"
+	replaceLiteral '__CHECKSUM_HBLOCK__' "$(checksum hblock)" "$baseDir/README.md"
+
+	replaceLiteral '__VERSION__' "$(version)" "$baseDir/resources/systemd/README.md"
+	replaceLiteral '__CHECKSUM_HBLOCK_SERVICE__' "$(checksum resources/systemd/hblock.service)" "$baseDir/resources/systemd/README.md"
+	replaceLiteral '__CHECKSUM_HBLOCK_TIMER__' "$(checksum resources/systemd/hblock.timer)" "$baseDir/resources/systemd/README.md"
 fi