diff --git a/src/controllers/auth.js b/src/controllers/auth.js
index a5099c2..8772f65 100644
--- a/src/controllers/auth.js
+++ b/src/controllers/auth.js
@@ -7,7 +7,7 @@
 const argon2 = require('argon2');
 const usersController = require('../controllers/usersController');
 
-hash_check = async function(user, password) {
+const hash_check = async function(user, password) {
   let verified = false;
   try {
     var users = await usersController.get_users();
diff --git a/src/controllers/usersController.js b/src/controllers/usersController.js
index 780dc48..59161b1 100644
--- a/src/controllers/usersController.js
+++ b/src/controllers/usersController.js
@@ -17,7 +17,7 @@ const chmod = util.promisify(fs.chmod);
 
 let _users = null;
 
-get_users = async function() {
+const get_users = async function() {
   if (_users) {
     return _users;
   } else {
@@ -31,7 +31,7 @@ get_users = async function() {
 }
 exports.get_users = get_users;
 
-update_users = async function(users) {
+const update_users = async function(users) {
   try {
     await writeFile(passwd_file, JSON.stringify(users), 'utf8');
     await chmod(passwd_file, 0600);
diff --git a/src/controllers/zt.js b/src/controllers/zt.js
index cf770ff..c2faad9 100644
--- a/src/controllers/zt.js
+++ b/src/controllers/zt.js
@@ -10,7 +10,7 @@ const token = require('./token');
 
 ZT_ADDR = process.env.ZT_ADDR || 'localhost:9993';
 
-init_options = async function() {
+const init_options = async function() {
   let tok = null;
 
   try {
@@ -29,7 +29,7 @@ init_options = async function() {
   return options;
 }
 
-get_zt_address = async function() {
+const get_zt_address = async function() {
   const options = await init_options();
 
   try {
@@ -68,7 +68,7 @@ exports.network_list = async function() {
   return networks;
 }
 
-network_detail = async function(nwid) {
+const network_detail = async function(nwid) {
   const options = await init_options();
 
   try {
@@ -241,7 +241,7 @@ exports.members = async function(nwid) {
   }
 }
 
-member_detail = async function(nwid, id) {
+const member_detail = async function(nwid, id) {
   const options = await init_options();
 
   try {