diff --git a/Dockerfile b/Dockerfile
index 28f66f8..b417d18 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,5 +16,5 @@ EXPOSE 25
 CMD ["/run.sh"]
 
 # health check
-HEALTHCHECK --interval=5m --timeout=3s \
+HEALTHCHECK --interval=1m --timeout=3s \
   CMD curl -s smtp://localhost:25 -v >/dev/null 2>&1