diff --git a/moleculer.config.ts b/moleculer.config.ts
index 646534c..72eee40 100644
--- a/moleculer.config.ts
+++ b/moleculer.config.ts
@@ -76,7 +76,7 @@ const brokerConfig: BrokerOptions = {
 	// More info: https://moleculer.services/docs/0.14/networking.html
 	// Note: During the development, you don't need to define it because all services will be loaded locally.
 	// In production you can set it via `TRANSPORTER=nats://localhost:4222` environment variable.
-	transporter: "NATS", // "NATS"
+	transporter: "redis", // "NATS"
 
 	// Define a cacher.
 	// More info: https://moleculer.services/docs/0.14/caching.html
diff --git a/package-lock.json b/package-lock.json
index 07f7c2d..c500f27 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -20,6 +20,7 @@
         "dotenv": "^10.0.0",
         "fs-extra": "^10.0.0",
         "imghash": "^0.0.9",
+        "ioredis": "^4.28.1",
         "jsdom": "^15.2.1",
         "leven": "^3.1.0",
         "lodash": "^4.17.21",
@@ -6333,9 +6334,9 @@
       }
     },
     "node_modules/ioredis": {
-      "version": "4.28.0",
-      "resolved": "https://registry.npmjs.org/ioredis/-/ioredis-4.28.0.tgz",
-      "integrity": "sha512-I+zkeeWp3XFgPT2CtJKxvaF5FjGBGt4yGYljRjQecdQKteThuAsKqffeF1lgHVlYnuNeozRbPOCDNZ7tDWPeig==",
+      "version": "4.28.1",
+      "resolved": "https://registry.npmjs.org/ioredis/-/ioredis-4.28.1.tgz",
+      "integrity": "sha512-7gcrUJEcPHWy+eEyq6wIZpXtfHt8crhbc5+z0sqrnHUkwBblXinygfamj+/jx83Qo+2LW3q87Nj2VsuH6BF2BA==",
       "dependencies": {
         "cluster-key-slot": "^1.1.0",
         "debug": "^4.3.1",
@@ -19492,9 +19493,9 @@
       }
     },
     "ioredis": {
-      "version": "4.28.0",
-      "resolved": "https://registry.npmjs.org/ioredis/-/ioredis-4.28.0.tgz",
-      "integrity": "sha512-I+zkeeWp3XFgPT2CtJKxvaF5FjGBGt4yGYljRjQecdQKteThuAsKqffeF1lgHVlYnuNeozRbPOCDNZ7tDWPeig==",
+      "version": "4.28.1",
+      "resolved": "https://registry.npmjs.org/ioredis/-/ioredis-4.28.1.tgz",
+      "integrity": "sha512-7gcrUJEcPHWy+eEyq6wIZpXtfHt8crhbc5+z0sqrnHUkwBblXinygfamj+/jx83Qo+2LW3q87Nj2VsuH6BF2BA==",
       "requires": {
         "cluster-key-slot": "^1.1.0",
         "debug": "^4.3.1",
diff --git a/package.json b/package.json
index 14da581..46e3b07 100644
--- a/package.json
+++ b/package.json
@@ -46,6 +46,7 @@
     "dotenv": "^10.0.0",
     "fs-extra": "^10.0.0",
     "imghash": "^0.0.9",
+    "ioredis": "^4.28.1",
     "jsdom": "^15.2.1",
     "leven": "^3.1.0",
     "lodash": "^4.17.21",
diff --git a/utils/uncompression.utils.ts b/utils/uncompression.utils.ts
index 2c08289..90f6e41 100644
--- a/utils/uncompression.utils.ts
+++ b/utils/uncompression.utils.ts
@@ -88,8 +88,9 @@ export const extractCoverFromFile = async (
 					walkedFolder.name +
 					"_cover.jpg"
 			);
-			const ebookMetaPath =
-				`${process.env.CALIBRE_EBOOK_META_PATH}` || `ebook-meta`;
+			const ebookMetaPath = process.env.CALIBRE_EBOOK_META_PATH
+				? `${process.env.CALIBRE_EBOOK_META_PATH}`
+				: `ebook-meta`;
 			result = await calibre.run(
 				ebookMetaPath,
 				[constructedPaths.inputFilePath],