diff --git a/setup b/setup
index fb6446d..2259180 100755
--- a/setup
+++ b/setup
@@ -136,6 +136,8 @@ write_settings() {
 }
 
 link_files() {
+  chmod 400 "${PWD}/config/msmtprc"
+
   ln -s "${PWD}/config/motion.conf" "/etc/motion/motion.conf"
   ln -s "${PWD}/config/msmtprc" "${MOTION_DIR}/.msmtprc"
   ln -s "${PWD}/config/muttrc"  "${MOTION_DIR}/.muttrc"