diff --git a/package.json b/package.json
index 2c3c4fabf..f3ef6953d 100644
--- a/package.json
+++ b/package.json
@@ -112,7 +112,6 @@
         "markdown-it-sub": "^2.0.0",
         "markdown-it-sup": "^2.0.0",
         "marked": "^0.7.0",
-        "memorystore": "^1.6.7",
         "nuxt": "^3.16.0",
         "path-to-regexp": "0.1.12",
         "postcss-rtl": "^2.0.0",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 19d1453f2..abae874ec 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -297,9 +297,6 @@ importers:
       marked:
         specifier: ^0.7.0
         version: 0.7.0
-      memorystore:
-        specifier: ^1.6.7
-        version: 1.6.7
       nuxt:
         specifier: ^3.16.0
         version: 3.16.0(@parcel/watcher@2.5.1)(@types/node@20.16.5)(db0@0.3.1(sqlite3@5.1.7))(encoding@0.1.13)(eslint@9.22.0(jiti@2.4.2))(ioredis@5.6.0)(magicast@0.3.5)(optionator@0.9.4)(rollup@4.35.0)(sass@1.32.12)(sqlite3@5.1.7)(terser@5.33.0)(typescript@5.7.2)(vite@6.2.2(@types/node@20.16.5)(jiti@2.4.2)(sass@1.32.12)(terser@5.33.0)(yaml@2.7.0))(vue-tsc@2.2.0(typescript@5.7.2))(yaml@2.7.0)
@@ -5403,9 +5400,6 @@ packages:
   lru-cache@10.4.3:
     resolution: {integrity: sha512-JNAzZcXrCt42VGLuYz0zfAzDfAvJWW6AfYlDBQyDV5DClI2m5sAmK+OIO7s59XfsRsWHp02jAJrRadPRGTt6SQ==}
 
-  lru-cache@4.1.5:
-    resolution: {integrity: sha512-sWZlbEP2OsHNkXrMl5GYk/jKk70MBng6UU4YI/qGDYbgf6YbP4EvmqISbXCoJiRKs+1bSpFHVgQxvJ17F2li5g==}
-
   lru-cache@5.1.1:
     resolution: {integrity: sha512-KpNARQA3Iwv+jTA0utUVVbrh+Jlrr1Fv0e56GGzAFOXN7dk/FviaDW8LHmK52DlcH4WP2n6gI8vN1aesBFgo9w==}
 
@@ -5503,10 +5497,6 @@ packages:
     resolution: {integrity: sha512-qX2bG48pTqYRVmDB37rn/6PT7LcR8T7oAX3bf99u1Tt1nzxYfxkgqDwUwolPlXweM0XzBOBFzSx4kfp7KP1s/w==}
     engines: {node: '>=6'}
 
-  memorystore@1.6.7:
-    resolution: {integrity: sha512-OZnmNY/NDrKohPQ+hxp0muBcBKrzKNtHr55DbqSx9hLsYVNnomSAMRAtI7R64t3gf3ID7tHQA7mG4oL3Hu9hdw==}
-    engines: {node: '>=0.10'}
-
   meow@3.7.0:
     resolution: {integrity: sha512-TNdwZs0skRlpPpCUK25StC4VH+tP5GgeY1HQOOGP+lQ2xtdkN2VtT/5tiX9k3IWpkBPV9b3LsAWXn4GGi/PrSA==}
     engines: {node: '>=0.10.0'}
@@ -6451,9 +6441,6 @@ packages:
   proxy-from-env@1.1.0:
     resolution: {integrity: sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg==}
 
-  pseudomap@1.0.2:
-    resolution: {integrity: sha512-b/YwNhb8lk1Zz2+bXXpS/LK9OisiZZ1SNsSLxN1x2OXVEhW2Ckr/7mWE5vrC1ZTiJlD9g19jWszTmJsB+oEpFQ==}
-
   psl@1.9.0:
     resolution: {integrity: sha512-E/ZsdU4HLs/68gYzgGTkMicWTLPdAftJLfJFlLUAAKZGkStNU72sZjT66SnMDVOfOWY/YAoiD7Jxa9iHvngcag==}
 
@@ -8098,9 +8085,6 @@ packages:
     resolution: {integrity: sha512-0pfFzegeDWJHJIAmTLRP2DwHjdF5s7jo9tuztdQxAhINCdvS+3nGINqPd00AphqJR/0LhANUS6/+7SCb98YOfA==}
     engines: {node: '>=10'}
 
-  yallist@2.1.2:
-    resolution: {integrity: sha512-ncTzHV7NvsQZkYe1DW7cbDLm0YpzHmZF5r/iyP3ZnQtMiJ+pjzisCiMNI+Sj+xQF5pXhSHxSB3uDbsBTzY/c2A==}
-
   yallist@3.1.1:
     resolution: {integrity: sha512-a4UGQaWPH59mOXUYnAG2ewncQS4i4F43Tv3JoAM+s2VDAmS9NsK8GpDMLrCHPksFT7h3K6TOoUNn2pb7RoXx4g==}
 
@@ -14535,11 +14519,6 @@ snapshots:
 
   lru-cache@10.4.3: {}
 
-  lru-cache@4.1.5:
-    dependencies:
-      pseudomap: 1.0.2
-      yallist: 2.1.2
-
   lru-cache@5.1.1:
     dependencies:
       yallist: 3.1.1
@@ -14651,13 +14630,6 @@ snapshots:
       mimic-fn: 2.1.0
       p-is-promise: 2.1.0
 
-  memorystore@1.6.7:
-    dependencies:
-      debug: 4.4.0(supports-color@9.4.0)
-      lru-cache: 4.1.5
-    transitivePeerDependencies:
-      - supports-color
-
   meow@3.7.0:
     dependencies:
       camelcase-keys: 2.1.0
@@ -15779,8 +15751,6 @@ snapshots:
 
   proxy-from-env@1.1.0: {}
 
-  pseudomap@1.0.2: {}
-
   psl@1.9.0: {}
 
   pump@3.0.2:
@@ -17658,8 +17628,6 @@ snapshots:
 
   y18n@5.0.8: {}
 
-  yallist@2.1.2: {}
-
   yallist@3.1.1: {}
 
   yallist@4.0.0: {}
diff --git a/server/index.ts b/server/index.ts
index 69edef19e..bf23c0b65 100644
--- a/server/index.ts
+++ b/server/index.ts
@@ -6,7 +6,6 @@ import session from 'express-session';
 import grant from 'grant';
 import { useBase } from 'h3';
 import { defineExpressHandler, getH3Event } from 'h3-express';
-import memorystore from 'memorystore';
 import SQL from 'sql-template-strings';
 
 import buildLocaleList from '../src/buildLocaleList.ts';
@@ -43,7 +42,26 @@ import { config } from './social.ts';
 import { closeAuditLogConnection } from '~/server/audit.ts';
 import { getLocale } from '~/server/data.ts';
 
-const MemoryStore = memorystore(session);
+class StorageStore extends session.Store {
+    get(sid: string, callback: (err: unknown, session?: (session.SessionData | null)) => void): void {
+        useStorage('data').getItem<session.SessionData>(`session:${sid}`)
+            .then((session) => callback(null, session))
+            .catch((error) => callback(error));
+    }
+
+    set(sid: string, session: session.SessionData, callback?: (err?: unknown) => void): void {
+        // unwrap session to make it a primitive object (otherwise unstorage will reject serializing the object)
+        useStorage('data').setItem(`session:${sid}`, { ...session })
+            .then(() => callback?.())
+            .catch((error) => callback?.(error));
+    }
+
+    destroy(sid: string, callback?: (err?: unknown) => void): void {
+        useStorage('data').removeItem(`session:${sid}`)
+            .then(() => callback?.())
+            .catch((error) => callback?.(error));
+    }
+}
 
 const router = express.Router();
 
@@ -52,9 +70,7 @@ router.use(session({
     cookie: { ...longtimeCookieSetting, sameSite: undefined }, // somehow, sameSite=lax breaks sign-in with apple 🙄
     resave: false,
     saveUninitialized: false,
-    store: new MemoryStore({
-        checkPeriod: 86400000, // 24h
-    }),
+    store: new StorageStore(),
 }));
 
 export class LazyDatabase implements Database {