diff --git a/js/common.js b/js/common.js
index 8c3b81c..bd24726 100644
--- a/js/common.js
+++ b/js/common.js
@@ -47,7 +47,7 @@ function $ajaxget(url, data) {
         axios
             .get(url, {
                 headers: {
-                    "Cache-Control": "max-age=3600",
+                    "Content-Type": "max-age=3600",
                 },
                 emulateJSON: true,
                 withCredentials: true,