diff --git a/scripts/opendkim.sh b/scripts/opendkim.sh
index 489af14..b5fa071 100644
--- a/scripts/opendkim.sh
+++ b/scripts/opendkim.sh
@@ -1,8 +1,17 @@
 #!/bin/sh
+
+noop() {
+    while true; do
+        # 2147483647 = max signed 32-bit integer
+        # 2147483647 s ≅ 70 years
+        sleep infinity || sleep 2147483647
+    done
+}
+
 if [ ! -d /etc/opendkim/keys ]; then
-    sleep 9999999999999999999
+    noop
 elif [ -z "$(find /etc/opendkim/keys -type f ! -name .)" ]; then
-    sleep 9999999999999999999
+    noop
 else
     /usr/sbin/opendkim -D -f -x /etc/opendkim/opendkim.conf
 fi