diff --git a/assets/javascripts/issue_dynamic_edit.js b/assets/javascripts/issue_dynamic_edit.js
index 21bf318..590d5e2 100644
--- a/assets/javascripts/issue_dynamic_edit.js
+++ b/assets/javascripts/issue_dynamic_edit.js
@@ -7,7 +7,8 @@ var _CONF_LISTENER_TYPE_VALUE = _CONF_LISTENER_TYPE_VALUE || "click";
 var _CONF_LISTENER_TYPE_ICON = _CONF_LISTENER_TYPE_ICON || "none";
 var _CONF_LISTENER_TARGET = _CONF_LISTENER_TARGET || "value";
 var _CONF_EXCLUDED_FIELD_ID = _CONF_EXCLUDED_FIELD_ID || [];
-var _CONF_CHECK_ISSUE_UPDATE_CONFLICT = _CONF_CHECK_ISSUE_UPDATE_CONFLICT || false;
+var __hasKey = (typeof _REDMINE_API_KEY !== 'undefined') && _REDMINE_API_KEY.length;
+var _CONF_CHECK_ISSUE_UPDATE_CONFLICT = (_CONF_CHECK_ISSUE_UPDATE_CONFLICT && __hasKey) || false;
 
 _CONF_LISTENER_TARGET = _CONF_LISTENER_TARGET === "all" ? "*" : _CONF_LISTENER_TARGET;
 
@@ -299,10 +300,12 @@ const getVersion = function(callback){
 
 let loadedDate = new Date();
 const checkVersion = function(callback){
-
 	fetch(LOCATION_HREF + ".json", {
 		method: 'GET',
 		crossDomain: true,
+		headers: {
+			'X-Redmine-API-Key': _REDMINE_API_KEY
+		},
 	}).then(res => res.text()).then(data => {
 		try {
 			const parsedData = JSON.parse(data);
diff --git a/lib/details_issue_hooks.rb b/lib/details_issue_hooks.rb
index bcab8bf..f4e384a 100644
--- a/lib/details_issue_hooks.rb
+++ b/lib/details_issue_hooks.rb
@@ -25,12 +25,18 @@ def view_layouts_base_body_bottom(context)
   end
 
   def view_issues_show_details_bottom(context)
+    api_key = if Setting.rest_api_enabled?
+      User.current.api_key || ""
+    else
+      ""
+    end
     content = "<script>\n"
     content << " const _ISSUE_ID = \"#{context[:request].path_parameters[:id]}\";\n"
     content << " const _PROJECT_ID = \"#{Issue.find(context[:request].path_parameters[:id]).project_id}\";\n"
     content << " const _TXT_CONFLICT_TITLE = \"" + l(:ide_txt_notice_conflict_title) + "\";\n"
     content << " const _TXT_CONFLICT_TXT = \"" + l(:ide_txt_notice_conflict_text) + "\";\n"
     content << " const _TXT_CONFLICT_LINK = \"" + l(:ide_txt_notice_conflict_link) + "\";\n"
+    content << " const _REDMINE_API_KEY = \"" + api_key + "\";\n" if api_key.present?
     content << "</script>\n"
     content << "<style>/* PRINT MEDIAQUERY */\n"
     content << "@media print {\n"