diff --git a/docker/etc/cron.d/docker-builder-prune b/docker/etc/cron.d/docker-builder-prune
index dcdafe459..975ce4f53 100644
--- a/docker/etc/cron.d/docker-builder-prune
+++ b/docker/etc/cron.d/docker-builder-prune
@@ -1,4 +1,4 @@
 PATH=/usr/local/bin:/usr/bin:/bin
 SHELL=/bin/bash
 
-5 4 * * * root /usr/local/bin/docker builder prune >>/var/log/dokku/builder-prune.log 2>&1
+5 4 * * * root /usr/local/bin/docker builder prune -f >>/var/log/dokku/builder-prune.log 2>&1