diff --git a/en/sitemap.xml.gz b/en/sitemap.xml.gz
index 87678e161..3a836c3f1 100644
Binary files a/en/sitemap.xml.gz and b/en/sitemap.xml.gz differ
diff --git a/sitemap.xml.gz b/sitemap.xml.gz
index c38d16962..161faa49a 100644
Binary files a/sitemap.xml.gz and b/sitemap.xml.gz differ
diff --git a/vercel.json b/vercel.json
index fe2d95ebc..1f1c4ad21 100644
--- a/vercel.json
+++ b/vercel.json
@@ -5,7 +5,7 @@
             "headers": [
                 {
                     "key": "Cache-Control",
-                    "value": "public, max-age=604800, must-revalidate"
+                    "value": "public, max-age=2592000, immutable"
                 }
             ]
         },
@@ -14,7 +14,7 @@
             "headers": [
                 {
                     "key": "Cache-Control",
-                    "value": "public, max-age=604800, must-revalidate"
+                    "value": "public, max-age=2592000, immutable"
                 }
             ]
         },
@@ -23,7 +23,7 @@
             "headers": [
                 {
                     "key": "Cache-Control",
-                    "value": "public, max-age=604800, must-revalidate"
+                    "value": "public, max-age=2592000, immutable"
                 }
             ]
         },
@@ -32,7 +32,7 @@
             "headers": [
                 {
                     "key": "Cache-Control",
-                    "value": "public, max-age=604800, must-revalidate"
+                    "value": "public, max-age=2592000, immutable"
                 }
             ]
         },
@@ -41,7 +41,7 @@
             "headers": [
                 {
                     "key": "Cache-Control",
-                    "value": "public, max-age=86400, must-revalidate"
+                    "value": "public, max-age=2592000, immutable"
                 }
             ]
         },
@@ -50,7 +50,7 @@
             "headers": [
                 {
                     "key": "Cache-Control",
-                    "value": "public, max-age=86400, must-revalidate"
+                    "value": "public, max-age=604800, immutable"
                 }
             ]
         },
@@ -59,7 +59,7 @@
             "headers": [
                 {
                     "key": "Cache-Control",
-                    "value": "public, max-age=86400, must-revalidate"
+                    "value": "public, max-age=604800, immutable"
                 }
             ]
         },
@@ -68,7 +68,7 @@
             "headers": [
                 {
                     "key": "Cache-Control",
-                    "value": "public, max-age=86400, must-revalidate"
+                    "value": "public, max-age=604800, immutable"
                 }
             ]
         },
@@ -77,7 +77,7 @@
             "headers": [
                 {
                     "key": "Cache-Control",
-                    "value": "public, max-age=3600, must-revalidate"
+                    "value": "public, max-age=86400, immutable"
                 }
             ]
         },
@@ -86,7 +86,7 @@
             "headers": [
                 {
                     "key": "Cache-Control",
-                    "value": "public, max-age=3600, must-revalidate"
+                    "value": "public, max-age=86400, immutable"
                 }
             ]
         }
diff --git a/zh-hant/sitemap.xml.gz b/zh-hant/sitemap.xml.gz
index b5b9f811a..d63d8c6a9 100644
Binary files a/zh-hant/sitemap.xml.gz and b/zh-hant/sitemap.xml.gz differ