diff --git a/src/externalldap.js b/src/externalldap.js
index ff22dd73e..b68da23b3 100644
--- a/src/externalldap.js
+++ b/src/externalldap.js
@@ -158,7 +158,7 @@ async function clientSearch(client, dn, searchOptions) {
             if (error instanceof ldap.NoSuchObjectError) return reject(new BoxError(BoxError.NOT_FOUND));
             if (error) return reject(new BoxError(BoxError.EXTERNAL_ERROR, error));
 
-            let ldapObjects = [];
+            const ldapObjects = [];
 
             result.on('searchEntry', entry => ldapObjects.push(entry.object));
             result.on('error', error => reject(new BoxError(BoxError.EXTERNAL_ERROR, error)));
@@ -348,11 +348,11 @@ async function syncUsers(config, progressCallback) {
     debug(`syncUsers: Found ${ldapUsers.length} users`);
 
     let percent = 10;
-    let step = 30/(ldapUsers.length+1); // ensure no divide by 0
+    const step = 30/(ldapUsers.length+1); // ensure no divide by 0
 
     // we ignore all errors here and just log them for now
     for (let i = 0; i < ldapUsers.length; i++) {
-        let ldapUser = translateUser(config, ldapUsers[i]);
+        const ldapUser = translateUser(config, ldapUsers[i]);
         if (!validUserRequirements(ldapUser)) continue;
 
         percent += step;
@@ -399,7 +399,7 @@ async function syncGroups(config, progressCallback) {
     debug(`syncGroups: Found ${ldapGroups.length} groups`);
 
     let percent = 40;
-    let step = 30/(ldapGroups.length+1); // ensure no divide by 0
+    const step = 30/(ldapGroups.length+1); // ensure no divide by 0
 
     for (const ldapGroup of ldapGroups) {
         let groupName = ldapGroup[config.groupnameField];
@@ -453,7 +453,7 @@ async function syncGroupMembers(config, progressCallback) {
         }
 
         // since our group names are lowercase we cannot use potentially case matching ldap filters
-        let found = result.find(function (r) {
+        const found = result.find(function (r) {
             if (!r[config.groupnameField]) return false;
             return r[config.groupnameField].toLowerCase() === group.name;
         });