diff --git a/package.json b/package.json
index 400dee4..799fc47 100644
--- a/package.json
+++ b/package.json
@@ -37,7 +37,7 @@
     "autoprefixer": "^10.4.20",
     "debug": "^4.3.6",
     "express": "^4.19.2",
-    "ioredis": "^5.0.0",
+    "ioredis": "^5.4.2",
     "next": "^15.1.3",
     "next-themes": "^0.4.4",
     "next-view-transitions": "^0.3.4",
@@ -57,7 +57,6 @@
   },
   "devDependencies": {
     "@types/debug": "^4.1.12",
-    "@types/ioredis": "^5.0.0",
     "@types/node": "^22.10.2",
     "@types/react": "^19.0.2",
     "@typescript-eslint/eslint-plugin": "^8.18.2",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 3a7e73b..6267837 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -18,7 +18,7 @@ dependencies:
     specifier: ^4.19.2
     version: 4.21.2
   ioredis:
-    specifier: ^5.0.0
+    specifier: ^5.4.2
     version: 5.4.2
   next:
     specifier: ^15.1.3
@@ -73,9 +73,6 @@ devDependencies:
   '@types/debug':
     specifier: ^4.1.12
     version: 4.1.12
-  '@types/ioredis':
-    specifier: ^5.0.0
-    version: 5.0.0
   '@types/node':
     specifier: ^22.10.2
     version: 22.10.5
@@ -408,6 +405,7 @@ packages:
 
   /@ioredis/commands@1.2.0:
     resolution: {integrity: sha512-Sx1pU8EM64o2BrqNpEO1CNLtKQwyhuXuqyfH7oGKCk+1a33d2r5saW8zNwm3j6BTExtjrv2BxTgzzkMwts6vGg==}
+    dev: false
 
   /@isaacs/cliui@8.0.2:
     resolution: {integrity: sha512-O8jcjabXaleOG9DQ0+ARXWZBTfnP4WNAqzuiJK7ll44AmxGKv/J2M4TPjxjY3znBCfvBXFzucm1twdyFybFqEA==}
@@ -644,15 +642,6 @@ packages:
     resolution: {integrity: sha512-D0CFMMtydbJAegzOyHjtiKPLlvnm3iTZyZRSZoLq2mRhDdmLfIWOCYPfQJ4cu2erKghU++QvjcUjp/5h7hESpA==}
     dev: false
 
-  /@types/ioredis@5.0.0:
-    resolution: {integrity: sha512-zJbJ3FVE17CNl5KXzdeSPtdltc4tMT3TzC6fxQS0sQngkbFZ6h+0uTafsRqu+eSLIugf6Yb0Ea0SUuRr42Nk9g==}
-    deprecated: This is a stub types definition. ioredis provides its own type definitions, so you do not need this installed.
-    dependencies:
-      ioredis: 5.4.2
-    transitivePeerDependencies:
-      - supports-color
-    dev: true
-
   /@types/json-schema@7.0.15:
     resolution: {integrity: sha512-5+fP8P8MFNC+AyZCDxrB2pkZFPGzqQWUzpSeuuVLvm8VMcorNYavBqoFcxK8bQz4Qsbn4oUEEem4wDLfcysGHA==}
     dev: true
@@ -1244,6 +1233,7 @@ packages:
   /cluster-key-slot@1.1.2:
     resolution: {integrity: sha512-RMr0FhtfXemyinomL4hrWcYJxmX6deFdCxpJzhDttxgO1+bcCnkk+9drydLVDmAMG7NE6aN/fl4F7ucU/90gAA==}
     engines: {node: '>=0.10.0'}
+    dev: false
 
   /color-convert@2.0.1:
     resolution: {integrity: sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==}
@@ -1460,6 +1450,7 @@ packages:
   /denque@2.1.0:
     resolution: {integrity: sha512-HVQE3AAb/pxF8fQAoiqpvg9i3evqug3hoiwakOyZAwJm+6vZehbkYXZ0l4JxS+I3QxM97v5aaRNhj8v5oBhekw==}
     engines: {node: '>=0.10'}
+    dev: false
 
   /depd@2.0.0:
     resolution: {integrity: sha512-g7nH6P6dyDioJogAAGprGpCtVImJhpPk/roCzdb3fIh61/s/nPsfR6onyMwkCAR/OlC3yBC0lESvUoQEAssIrw==}
@@ -2526,6 +2517,7 @@ packages:
       standard-as-callback: 2.1.0
     transitivePeerDependencies:
       - supports-color
+    dev: false
 
   /ipaddr.js@1.9.1:
     resolution: {integrity: sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g==}
@@ -2987,9 +2979,11 @@ packages:
 
   /lodash.defaults@4.2.0:
     resolution: {integrity: sha512-qjxPLHd3r5DnsdGacqOMU6pb/avJzdh9tFX2ymgoZE27BmjXrNy/y4LoaiTeAb+O3gL8AfpJGtqfX/ae2leYYQ==}
+    dev: false
 
   /lodash.isarguments@3.1.0:
     resolution: {integrity: sha512-chi4NHZlZqZD18a0imDHnZPrDeBbTtVN7GXMwuGdRH9qotxAjYs3aVLKc7zNOG9eddR5Ksd8rvFEBc9SsggPpg==}
+    dev: false
 
   /lodash.merge@4.6.2:
     resolution: {integrity: sha512-0KpjqXRVvrYyCsX1swR/XTK0va6VQkQM6MNo7PqW77ByjAhoARA8EfrP1N4+KlKj8YS0ZUCtRT/YUuhyYDujIQ==}
@@ -3688,12 +3682,14 @@ packages:
   /redis-errors@1.2.0:
     resolution: {integrity: sha512-1qny3OExCf0UvUV/5wpYKf2YwPcOqXzkwKKSmKHiE6ZMQs5heeE/c8eXK+PNllPvmjgAbfnsbpkGZWy8cBpn9w==}
     engines: {node: '>=4'}
+    dev: false
 
   /redis-parser@3.0.0:
     resolution: {integrity: sha512-DJnGAeenTdpMEH6uAJRK/uiyEIH9WVsUmoLwzudwGJUwZPp80PDBWPHXSAGNPwNvIXAbe7MSUB1zQFugFml66A==}
     engines: {node: '>=4'}
     dependencies:
       redis-errors: 1.2.0
+    dev: false
 
   /reflect.getprototypeof@1.0.6:
     resolution: {integrity: sha512-fmfw4XgoDke3kdI6h4xcUz1dG8uaiv5q9gcEwLS4Pnth2kxT+GZ7YehS1JTMGBQmtV7Y4GFGbs2re2NqhdozUg==}
@@ -4052,6 +4048,7 @@ packages:
 
   /standard-as-callback@2.1.0:
     resolution: {integrity: sha512-qoRRSyROncaz1z0mvYqIE4lCd9p2R90i6GxW3uZv5ucSu8tU7B5HXUP1gG8pVZsYNVaXjk8ClXHPttLyxAL48A==}
+    dev: false
 
   /statuses@2.0.1:
     resolution: {integrity: sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ==}
diff --git a/src/channel.ts b/src/channel.ts
index 8d7568c..c22c352 100644
--- a/src/channel.ts
+++ b/src/channel.ts
@@ -209,7 +209,7 @@ export class MemoryChannelRepo implements ChannelRepo {
 }
 
 export class RedisChannelRepo implements ChannelRepo {
-  client: Redis.Redis
+  client: Redis
 
   constructor() {
     this.client = getRedisClient()
diff --git a/src/redisClient.ts b/src/redisClient.ts
index 6bf3aaa..6383758 100644
--- a/src/redisClient.ts
+++ b/src/redisClient.ts
@@ -2,11 +2,13 @@ import Redis from 'ioredis'
 
 export { Redis }
 
-let redisClient: Redis.Redis | null = null
+let redisClient: Redis | null = null
 
-export function getRedisClient(): Redis.Redis {
+export function getRedisClient(): Redis {
   if (!redisClient) {
-    redisClient = new Redis(process.env.REDIS_URL)
+    redisClient = process.env.REDIS_URL
+      ? new Redis(process.env.REDIS_URL)
+      : new Redis()
   }
   return redisClient
 }