diff --git a/Makefile b/Makefile
index cdf66da..69ef2e9 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,7 @@ install: rdo
 	chmod 755 /usr/bin/rdo
 	chmod u+s /usr/bin/rdo
 	cp rdo_sample.conf /etc/rdo.conf
+	chmod 600 /etc/rdo.conf
 
 uninstall:
 	rm /usr/bin/rdo