diff --git a/astro.config.mjs b/astro.config.mjs
index 78d7b9c..b35c2d0 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -38,6 +38,11 @@ export default defineConfig({
         access: 'secret',
         default: 'https://legacy.passthem.top/api',
       }),
+      REDIS_URL: envField.string({
+        context: 'server',
+        access: 'secret',
+        default: '',
+      }),
     },
   },
 })
diff --git a/package-lock.json b/package-lock.json
index cffe5f5..54b301d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,6 +14,7 @@
         "@astrojs/vue": "^6.0.1",
         "@iconify-json/material-symbols": "^1.2.65",
         "@iconify-json/mdi": "^1.2.3",
+        "@keyv/redis": "^5.1.6",
         "@markdoc/markdoc": "^0.5.7",
         "@traptitech/markdown-it-katex": "^3.6.0",
         "@types/react": "^19.2.14",
@@ -1977,6 +1978,23 @@
         "@jridgewell/sourcemap-codec": "^1.4.14"
       }
     },
+    "node_modules/@keyv/redis": {
+      "version": "5.1.6",
+      "resolved": "https://registry.npmjs.org/@keyv/redis/-/redis-5.1.6.tgz",
+      "integrity": "sha512-eKvW6pspvVaU5dxigaIDZr635/Uw6urTXL3gNbY9WTR8d3QigZQT+r8gxYSEOsw4+1cCBsC4s7T2ptR0WC9LfQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@redis/client": "^5.10.0",
+        "cluster-key-slot": "^1.1.2",
+        "hookified": "^1.13.0"
+      },
+      "engines": {
+        "node": ">= 18"
+      },
+      "peerDependencies": {
+        "keyv": "^5.6.0"
+      }
+    },
     "node_modules/@keyv/serialize": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/@keyv/serialize/-/serialize-1.1.1.tgz",
@@ -2089,6 +2107,26 @@
       "integrity": "sha512-wwQAWhWSuHaag8c4q/KN/vCoeOJYshAIvMQwD4GpSb3OiZklFfvAgmj0VCBBImRpuF/aFgIRzllXlVX93Jevww==",
       "license": "MIT"
     },
+    "node_modules/@redis/client": {
+      "version": "5.11.0",
+      "resolved": "https://registry.npmjs.org/@redis/client/-/client-5.11.0.tgz",
+      "integrity": "sha512-GHoprlNQD51Xq2Ztd94HHV94MdFZQ3CVrpA04Fz8MVoHM0B7SlbmPEVIjwTbcv58z8QyjnrOuikS0rWF03k5dQ==",
+      "license": "MIT",
+      "dependencies": {
+        "cluster-key-slot": "1.1.2"
+      },
+      "engines": {
+        "node": ">= 18"
+      },
+      "peerDependencies": {
+        "@node-rs/xxhash": "^1.1.0"
+      },
+      "peerDependenciesMeta": {
+        "@node-rs/xxhash": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/@rolldown/pluginutils": {
       "version": "1.0.0-rc.2",
       "resolved": "https://registry.npmjs.org/@rolldown/pluginutils/-/pluginutils-1.0.0-rc.2.tgz",
@@ -3939,6 +3977,15 @@
         "node": ">=6"
       }
     },
+    "node_modules/cluster-key-slot": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/cluster-key-slot/-/cluster-key-slot-1.1.2.tgz",
+      "integrity": "sha512-RMr0FhtfXemyinomL4hrWcYJxmX6deFdCxpJzhDttxgO1+bcCnkk+9drydLVDmAMG7NE6aN/fl4F7ucU/90gAA==",
+      "license": "Apache-2.0",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/colorette": {
       "version": "2.0.20",
       "resolved": "https://registry.npmjs.org/colorette/-/colorette-2.0.20.tgz",
@@ -5642,6 +5689,12 @@
       "integrity": "sha512-Yc+BQe8SvoXH1643Qez1zqLRmbA5rCL+sSmk6TVos0LWVfNIB7PGncdlId77WzLGSIB5KaWgTaNTs2lNVEI6VQ==",
       "license": "MIT"
     },
+    "node_modules/hookified": {
+      "version": "1.15.1",
+      "resolved": "https://registry.npmjs.org/hookified/-/hookified-1.15.1.tgz",
+      "integrity": "sha512-MvG/clsADq1GPM2KGo2nyfaWVyn9naPiXrqIe4jYjXNZQt238kWyOGrsyc/DmRAQ+Re6yeo6yX/yoNCG5KAEVg==",
+      "license": "MIT"
+    },
     "node_modules/html-escaper": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/html-escaper/-/html-escaper-3.0.3.tgz",
diff --git a/package.json b/package.json
index 185fbcf..a1c197e 100644
--- a/package.json
+++ b/package.json
@@ -32,6 +32,7 @@
     "@astrojs/vue": "^6.0.1",
     "@iconify-json/material-symbols": "^1.2.65",
     "@iconify-json/mdi": "^1.2.3",
+    "@keyv/redis": "^5.1.6",
     "@markdoc/markdoc": "^0.5.7",
     "@traptitech/markdown-it-katex": "^3.6.0",
     "@types/react": "^19.2.14",
diff --git a/src/lib/keyv-cache.server.ts b/src/lib/keyv-cache.server.ts
new file mode 100644
index 0000000..ac3622c
--- /dev/null
+++ b/src/lib/keyv-cache.server.ts
@@ -0,0 +1,4 @@
+import { REDIS_URL } from 'astro:env/server'
+import KeyvRedis from '@keyv/redis'
+
+export const storage = REDIS_URL ? new KeyvRedis(REDIS_URL) : new Map()
diff --git a/src/lib/markdoc-cache.server.ts b/src/lib/markdoc-cache.server.ts
index 9c64c12..9e59db3 100644
--- a/src/lib/markdoc-cache.server.ts
+++ b/src/lib/markdoc-cache.server.ts
@@ -3,10 +3,12 @@ import './server-only.ts'
 import type { RenderableTreeNode } from '@markdoc/markdoc'
 import KeyV from 'keyv'
 import { createHash } from 'node:crypto'
+import { storage } from './keyv-cache.server.ts'
 
 const markdocVersion = '1'
 
 export const markdocCache = new KeyV<RenderableTreeNode>({
+  store: storage,
   namespace: `markdoc-cache-${markdocVersion}`,
   ttl: 1000 * 60 * 60 * 24 * 7,
 })
diff --git a/src/pages/rss.xml.ts b/src/pages/rss.xml.ts
index 53dca01..74d652e 100644
--- a/src/pages/rss.xml.ts
+++ b/src/pages/rss.xml.ts
@@ -10,10 +10,12 @@ import { ensureShikiEngine } from '../lib/markdown'
 import Markdoc from '@markdoc/markdoc'
 import KeyV from 'keyv'
 import { createHash } from 'node:crypto'
+import { storage } from '../lib/keyv-cache.server'
 
 export const prerender = false
 
 const renderCache = new KeyV<string>({
+  store: storage,
   namespace: 'markdoc-rss',
 })