diff --git a/CHANGELOG.md b/CHANGELOG.md
index 6f1f52c..604f259 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## v0.5.1 (2026-10-03)
+
+- docker: the scheduled sync ran twice at once; the crontab was written to `/etc/cron.d`, which dcron reads by itself, and then installed again with `crontab` ([#29](https://github.com/katbyte/ghp-sync/pull/29))
+
 ## v0.5.0 (2026-09-23)
 
 - add `Last Reviewer` PR field, who left the most recent submitted review; refreshed on open PRs too ([#27](https://github.com/katbyte/ghp-sync/pull/27))
diff --git a/docker-compose.yml b/docker-compose.yml
index 19162f6..fc16a50 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,7 +3,7 @@ version: "3.6"
 services:
   ghp-sync:
     # published on release; `docker compose pull` picks up a new build of this tag
-    image: ghcr.io/katbyte/ghp-sync:v0.5.0
+    image: ghcr.io/katbyte/ghp-sync:v0.5.1
     container_name: ghp-sync
     environment:
       - "TZ=America/Vancouver"
diff --git a/scripts/entry.sh b/scripts/entry.sh
index f433791..f3d3a55 100644
--- a/scripts/entry.sh
+++ b/scripts/entry.sh
@@ -5,10 +5,10 @@
 #copy env
 env >> /etc/profile
 
-#setup cron
-echo "$SYNC_CRON /app/scripts/run.sh 2>&1 | tee -a /var/log/ghp-sync.log" > /etc/cron.d/crontab
-chmod 0644 /etc/cron.d/crontab
-crontab /etc/cron.d/crontab
+#setup cron: the file stays out of /etc/cron.d, which dcron reads on its own - a crontab written
+# there and then installed with crontab is registered twice, and every sync runs twice at once
+echo "$SYNC_CRON /app/scripts/run.sh 2>&1 | tee -a /var/log/ghp-sync.log" > /app/crontab
+crontab /app/crontab
 touch /var/log/cron.log
 
 # start cron