diff --git a/src/main/webapp/WEB-INF/jsp/base/actionGroup/actionGroup-main.jsp b/src/main/webapp/WEB-INF/jsp/base/actionGroup/actionGroup-main.jsp
index 01ede61d..e23180a8 100644
--- a/src/main/webapp/WEB-INF/jsp/base/actionGroup/actionGroup-main.jsp
+++ b/src/main/webapp/WEB-INF/jsp/base/actionGroup/actionGroup-main.jsp
@@ -120,7 +120,7 @@
 
 <script src="<c:url value="/resources/js/base/actionGroup.js"/>" type="text/javascript"></script>
 <script>
-let ${infoPrefix}Control = new ActionGroupControl();
+var ${infoPrefix}Control = new ActionGroupControl();
 
 function search${infoPrefix}s() {
 	${infoPrefix}Control.groups.query = {
diff --git a/src/main/webapp/WEB-INF/jsp/base/authority/authority-main.jsp b/src/main/webapp/WEB-INF/jsp/base/authority/authority-main.jsp
index 3cc0f887..4c9b9643 100644
--- a/src/main/webapp/WEB-INF/jsp/base/authority/authority-main.jsp
+++ b/src/main/webapp/WEB-INF/jsp/base/authority/authority-main.jsp
@@ -105,7 +105,7 @@
 <script src="<c:url value="/resources/js/base/actionGroup.js?${ver}"/>"></script>
 <script src="<c:url value="/resources/js/base/authority.js?${ver}"/>"></script>
 <script>
-let ${infoPrefix}Control = new AuthorityControl();
+var ${infoPrefix}Control = new AuthorityControl();
 
 function search${infoPrefix}s() {
 	${infoPrefix}Control.authorities.query = {
diff --git a/src/main/webapp/WEB-INF/jsp/base/code/code-main.jsp b/src/main/webapp/WEB-INF/jsp/base/code/code-main.jsp
index be9e95a6..cd2e00c3 100644
--- a/src/main/webapp/WEB-INF/jsp/base/code/code-main.jsp
+++ b/src/main/webapp/WEB-INF/jsp/base/code/code-main.jsp
@@ -121,7 +121,7 @@
 
 <script src="<c:url value="/resources/js/base/code.js"/>?${ver}"></script>
 <script>
-let codeControl = new CodeControl();
+var codeControl = new CodeControl();
 
 function searchGroups() {
 	codeControl.groups.query = {
diff --git a/src/main/webapp/WEB-INF/jsp/base/menu/menu-main.jsp b/src/main/webapp/WEB-INF/jsp/base/menu/menu-main.jsp
index e4dca99f..bfaebf53 100644
--- a/src/main/webapp/WEB-INF/jsp/base/menu/menu-main.jsp
+++ b/src/main/webapp/WEB-INF/jsp/base/menu/menu-main.jsp
@@ -111,7 +111,7 @@ function toggleMenus() {
 	$("#menuToggler").text(menuBranches.toggleFolding() == "collapsed" ? "+ 펼치기" : "- 닫기");
 }
 
-let menuControl = new MenuControl();
+var menuControl = new MenuControl();
 
 menuControl.onDatasetChange = obj => {
 	menuBranches.setData(treeHtml(menuControl.menus, {
diff --git a/src/main/webapp/WEB-INF/jsp/base/user/user-main.jsp b/src/main/webapp/WEB-INF/jsp/base/user/user-main.jsp
index e8076617..dccd7814 100644
--- a/src/main/webapp/WEB-INF/jsp/base/user/user-main.jsp
+++ b/src/main/webapp/WEB-INF/jsp/base/user/user-main.jsp
@@ -84,7 +84,7 @@
 
 <script src="<c:url value="/resources/js/base/user.js?${ver}"/>"></script>
 <script>
-let ${infoPrefix}Control = new UserControl();
+var ${infoPrefix}Control = new UserControl();
 
 function search${infoPrefix}s() {
 	${infoPrefix}Control.query = {