diff --git a/README.md b/README.md
index dfa5a9e..5c099ae 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,7 @@ available to all. This script is for [lwn][0].
 
 * [yq][1]
 * [miller][2]
+* [jo][3]
 
 ### Usage
 
@@ -41,3 +42,4 @@ Marking as unread. entry: 3060 title: [$] An end to uniprocessor configurations
 [0]: https://lwn.net
 [1]: https://github.com/mikefarah/yq
 [2]: https://github.com/johnkerl/miller
+[3]: https://github.com/jpmens/jo
diff --git a/run.sh b/run.sh
index 5377c1d..6ca82d5 100755
--- a/run.sh
+++ b/run.sh
@@ -16,12 +16,12 @@ process() {
 
 	echo "Updating title. entry: $eid title: $title"
 	curl --fail -o /dev/null -s -X PUT "$MURL/v1/entries/$eid" \
-		--json "$(printf '{"title":"%s"}' "${title/$/✓}")" \
+		--json "$(jo title="${title/$/✓}")" \
 		-H "X-Auth-Token: $MINIFLUX_TOKEN"
 
 	echo "Marking as unread. entry: $eid title: $title"
 	curl --fail -s -X PUT "$MURL/v1/entries" \
-		--json "$(printf '{"entry_ids":[%s],"status":"unread"}' "$eid")" \
+		--json "$(jo entry_ids="$(jo -a "$eid")" status=unread)" \
 		-H "X-Auth-Token: $MINIFLUX_TOKEN"
 
 }