diff --git a/healthcheck.sh b/healthcheck.sh
index 962866af08..dcfcf76786 100644
--- a/healthcheck.sh
+++ b/healthcheck.sh
@@ -4,4 +4,4 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 PORT=$(grep '^port:' /misskey/.config/default.yml | awk 'NR==1{print $2; exit}')
-curl -Sfso /dev/null "http://localhost:${PORT}/healthz"
+curl -Sfso/dev/null "http://localhost:${PORT}/healthz"