diff --git a/lib/redis.ts b/lib/redis.ts
index bc0e1fe..6076321 100644
--- a/lib/redis.ts
+++ b/lib/redis.ts
@@ -3,7 +3,7 @@ import Redis from 'ioredis';
 let redis;
 
 if (!redis) {
-  redis = new Redis(process.env.REDIS_URL);
+  redis = new Redis(process.env.REDIS_URL!);
 
   redis.on('error', (err) => {
     console.error('Redis Client Error:', err);
diff --git a/package.json b/package.json
index 4daed9c..91e65fa 100644
--- a/package.json
+++ b/package.json
@@ -81,6 +81,7 @@
     "@testing-library/react": "^16.2.0",
     "@types/compression": "^1.7.5",
     "@types/dompurify": "^3",
+    "@types/ioredis": "^5.0.0",
     "@types/jest": "^29.5.14",
     "@types/lodash": "^4.17.14",
     "@types/mdx": "^2.0.13",
diff --git a/yarn.lock b/yarn.lock
index 7b2e28d..9ab9b3c 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4325,6 +4325,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/ioredis@npm:^5.0.0":
+  version: 5.0.0
+  resolution: "@types/ioredis@npm:5.0.0"
+  dependencies:
+    ioredis: "npm:*"
+  checksum: 10c0/e52ce4239f0334701fc95fb5aaf1753d75f7582099fdf152743192f49d9ee4a88478b339d015e50cb5e111e38925846cf20668355f4046af7855021d2be181f0
+  languageName: node
+  linkType: hard
+
 "@types/istanbul-lib-coverage@npm:*, @types/istanbul-lib-coverage@npm:^2.0.0, @types/istanbul-lib-coverage@npm:^2.0.1":
   version: 2.0.6
   resolution: "@types/istanbul-lib-coverage@npm:2.0.6"
@@ -7995,7 +8004,7 @@ __metadata:
   languageName: node
   linkType: hard
 
-"ioredis@npm:^5.4.2":
+"ioredis@npm:*, ioredis@npm:^5.4.2":
   version: 5.4.2
   resolution: "ioredis@npm:5.4.2"
   dependencies:
@@ -12618,6 +12627,7 @@ __metadata:
     "@testing-library/react": "npm:^16.2.0"
     "@types/compression": "npm:^1.7.5"
     "@types/dompurify": "npm:^3"
+    "@types/ioredis": "npm:^5.0.0"
     "@types/jest": "npm:^29.5.14"
     "@types/lodash": "npm:^4.17.14"
     "@types/mdx": "npm:^2.0.13"