diff --git a/.env.example b/.env.example
index ca95628..bf790bb 100644
--- a/.env.example
+++ b/.env.example
@@ -1,11 +1,8 @@
 # Copy this file to .env and customize the values for your environment
 # cp .env.example .env
 
-# Couchbase configuration
-COUCHBASE_CONNECTION_STRING=couchbase://localhost
-COUCHBASE_USERNAME=admin
-COUCHBASE_PASSWORD=your_password_here
-COUCHBASE_BUCKET_NAME=store_scraper
+# Redis configuration
+REDIS_URL=localhost:6379
 
 # Telegram Bot configuration
 TELEGRAM_BOT_TOKEN=your_telegram_bot_token_here
diff --git a/build.gradle.kts b/build.gradle.kts
index e3451cd..9bb2710 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -22,13 +22,15 @@ configurations {
 
 dependencies {
     annotationProcessor("org.projectlombok:lombok:1.18.36")
-    implementation("com.couchbase.client:java-client:3.4.11")
+    implementation("com.google.code.gson:gson:2.11.0")
+    implementation("com.google.guava:guava:33.4.0-jre")
+    implementation("org.apache.commons:commons-text:1.13.0")
     implementation("org.apache.logging.log4j:log4j-core:2.24.3")
     implementation("org.apache.logging.log4j:log4j-slf4j2-impl:2.24.3")
-    // implementation("org.telegram:telegrambots-abilities:8.0.0")
     implementation("org.telegram:telegrambots-client:8.0.0")
     implementation("org.telegram:telegrambots-extensions:8.0.0")
     implementation("org.telegram:telegrambots-longpolling:8.0.0")
+    implementation("redis.clients:jedis:5.2.0")
 
     testAnnotationProcessor("org.projectlombok:lombok:1.18.36")
     testImplementation(platform("org.junit:junit-bom:5.11.4"))
diff --git a/compose.dev.yml b/compose.dev.yml
index 4a2e505..3f4d356 100644
--- a/compose.dev.yml
+++ b/compose.dev.yml
@@ -1,18 +1,12 @@
 services:
-  couchbase:
-    image: couchbase:community-7.6.2
-    env_file:
-      - .env
+  redis:
+    image: redis:7.2-alpine
     ports:
-      - "8091-8097:8091-8097"
-      - "9123:9123"
-      - "11207:11207"
-      - "11210:11210"
-      - "11280:11280"
-      - "18091-18097:18091-18097"
+      - "6379:6379"
     volumes:
-      - couchbase_data:/opt/couchbase/var
+      - redis_data:/data
     restart: unless-stopped
+    command: redis-server --appendonly yes
 
 volumes:
-  couchbase_data:
+  redis_data:
\ No newline at end of file
diff --git a/compose.yml b/compose.yml
index 2a951d5..8b86a6e 100644
--- a/compose.yml
+++ b/compose.yml
@@ -2,36 +2,6 @@ services:
   server:
     build:
       context: .
-    env_file:
-      - .env
-    depends_on:
-      - couchbase
-    hostname: couchbase
-    networks:
-      - internal
-    command: >
-      bash -c "couchbase-server -- -advertised_hostname couchbase"
 
-  couchbase:
-    image: couchbase:community-7.6.2
-    # env_file:
-    #  - .env
-    # ports: # Enable these ports if you need
-    #   - "8091-8097:8091-8097"
-    #   - "9123:9123"
-    #   - "11207:11207"
-    #   - "11210:11210"
-    #   - "11280:11280"
-    #   - "18091-18097:18091-18097"
-    volumes:
-      - couchbase_data:/opt/couchbase/var
-    restart: unless-stopped
-    networks:
-      - internal
-
-volumes:
-  couchbase_data:
-
-networks:
-  internal:
-    driver: bridge
+# If you need redis, add redis service
+# Check compose.dev.yml for example
diff --git a/src/main/java/com/miti99/storescraperbot/api/apple/AppStoreScraper.java b/src/main/java/com/miti99/storescraperbot/api/apple/AppStoreScraper.java
index a023f43..1e7370b 100644
--- a/src/main/java/com/miti99/storescraperbot/api/apple/AppStoreScraper.java
+++ b/src/main/java/com/miti99/storescraperbot/api/apple/AppStoreScraper.java
@@ -1,10 +1,8 @@
 package com.miti99.storescraperbot.api.apple;
 
-import com.couchbase.client.core.deps.io.netty.handler.codec.http.HttpHeaderNames;
-import com.couchbase.client.core.deps.io.netty.handler.codec.http.HttpHeaderValues;
 import com.miti99.storescraperbot.api.apple.request.AppleAppRequest;
 import com.miti99.storescraperbot.api.apple.response.AppleAppResponse;
-import com.miti99.storescraperbot.util.JacksonUtil;
+import com.miti99.storescraperbot.util.GsonUtil;
 import java.net.URI;
 import java.net.http.HttpClient;
 import java.net.http.HttpClient.Redirect;
@@ -22,10 +20,8 @@ public class AppStoreScraper {
         HttpRequest.newBuilder()
             .uri(URI.create(BASE_URL + "/app"))
             // .timeout(Duration.ofMillis(TIMEOUT))
-            .header(
-                HttpHeaderNames.CONTENT_TYPE.toString(),
-                HttpHeaderValues.APPLICATION_JSON.toString())
-            .POST(BodyPublishers.ofString(JacksonUtil.writeValueAsString(request)))
+            .header("Content-Type", "application/json")
+            .POST(BodyPublishers.ofString(GsonUtil.toJson(request)))
             .build();
 
     var body =
@@ -35,6 +31,6 @@ public class AppStoreScraper {
             .build()
             .send(httpRequest, BodyHandlers.ofString())
             .body();
-    return JacksonUtil.readValue(body, AppleAppResponse.class);
+    return GsonUtil.fromJson(body, AppleAppResponse.class);
   }
 }
diff --git a/src/main/java/com/miti99/storescraperbot/api/google/GooglePlayScraper.java b/src/main/java/com/miti99/storescraperbot/api/google/GooglePlayScraper.java
index 4b12fc4..02b3c09 100644
--- a/src/main/java/com/miti99/storescraperbot/api/google/GooglePlayScraper.java
+++ b/src/main/java/com/miti99/storescraperbot/api/google/GooglePlayScraper.java
@@ -1,10 +1,8 @@
 package com.miti99.storescraperbot.api.google;
 
-import com.couchbase.client.core.deps.io.netty.handler.codec.http.HttpHeaderNames;
-import com.couchbase.client.core.deps.io.netty.handler.codec.http.HttpHeaderValues;
 import com.miti99.storescraperbot.api.google.request.GoogleAppRequest;
 import com.miti99.storescraperbot.api.google.response.GoogleAppResponse;
-import com.miti99.storescraperbot.util.JacksonUtil;
+import com.miti99.storescraperbot.util.GsonUtil;
 import java.net.URI;
 import java.net.http.HttpClient;
 import java.net.http.HttpClient.Redirect;
@@ -22,10 +20,8 @@ public class GooglePlayScraper {
         HttpRequest.newBuilder()
             .uri(URI.create(BASE_URL + "/app"))
             // .timeout(Duration.ofMillis(TIMEOUT))
-            .header(
-                HttpHeaderNames.CONTENT_TYPE.toString(),
-                HttpHeaderValues.APPLICATION_JSON.toString())
-            .POST(BodyPublishers.ofString(JacksonUtil.writeValueAsString(request)))
+            .header("Content-Type", "application/json")
+            .POST(BodyPublishers.ofString(GsonUtil.toJson(request)))
             .build();
 
     var body =
@@ -35,6 +31,6 @@ public class GooglePlayScraper {
             .build()
             .send(httpRequest, BodyHandlers.ofString())
             .body();
-    return JacksonUtil.readValue(body, GoogleAppResponse.class);
+    return GsonUtil.fromJson(body, GoogleAppResponse.class);
   }
 }
diff --git a/src/main/java/com/miti99/storescraperbot/config/Config.java b/src/main/java/com/miti99/storescraperbot/config/Config.java
index 2ecc0d6..e89db87 100644
--- a/src/main/java/com/miti99/storescraperbot/config/Config.java
+++ b/src/main/java/com/miti99/storescraperbot/config/Config.java
@@ -8,11 +8,7 @@ import java.util.Set;
 import java.util.stream.Collectors;
 
 public class Config {
-  public static final String COUCHBASE_CONNECTION_STRING =
-      System.getenv("COUCHBASE_CONNECTION_STRING");
-  public static final String COUCHBASE_USERNAME = System.getenv("COUCHBASE_USERNAME");
-  public static final String COUCHBASE_PASSWORD = System.getenv("COUCHBASE_PASSWORD");
-  public static final String COUCHBASE_BUCKET_NAME = System.getenv("COUCHBASE_BUCKET_NAME");
+  public static final String REDIS_URL = System.getenv("REDIS_URL");
 
   public static final String TELEGRAM_BOT_TOKEN = System.getenv("TELEGRAM_BOT_TOKEN");
   public static final String TELEGRAM_BOT_USERNAME = System.getenv("TELEGRAM_BOT_USERNAME");
diff --git a/src/main/java/com/miti99/storescraperbot/constant/Constant.java b/src/main/java/com/miti99/storescraperbot/constant/Constant.java
new file mode 100644
index 0000000..4a7fee3
--- /dev/null
+++ b/src/main/java/com/miti99/storescraperbot/constant/Constant.java
@@ -0,0 +1,5 @@
+package com.miti99.storescraperbot.constant;
+
+public class Constant {
+  public static final String APP_NAME = "store_scraper_bot";
+}
diff --git a/src/main/java/com/miti99/storescraperbot/model/AbstractModel.java b/src/main/java/com/miti99/storescraperbot/model/AbstractModel.java
index 44b3586..6659b30 100644
--- a/src/main/java/com/miti99/storescraperbot/model/AbstractModel.java
+++ b/src/main/java/com/miti99/storescraperbot/model/AbstractModel.java
@@ -1,11 +1,14 @@
 package com.miti99.storescraperbot.model;
 
-import com.fasterxml.jackson.annotation.JsonProperty;
+import com.google.gson.annotations.SerializedName;
 import lombok.Getter;
+import lombok.RequiredArgsConstructor;
 
 @Getter
+@RequiredArgsConstructor
 public abstract class AbstractModel<K> {
+  final K key;
 
-  @JsonProperty("class")
+  @SerializedName("class")
   protected String clazz = getClass().getSimpleName();
 }
diff --git a/src/main/java/com/miti99/storescraperbot/model/Admin.java b/src/main/java/com/miti99/storescraperbot/model/Admin.java
index fec1850..49fd54b 100644
--- a/src/main/java/com/miti99/storescraperbot/model/Admin.java
+++ b/src/main/java/com/miti99/storescraperbot/model/Admin.java
@@ -10,4 +10,8 @@ import lombok.Setter;
 @Setter
 public class Admin extends AbstractModel<String> {
   List<Long> groups = new ArrayList<>();
+
+  public Admin(String key) {
+    super(key);
+  }
 }
diff --git a/src/main/java/com/miti99/storescraperbot/model/AppleApp.java b/src/main/java/com/miti99/storescraperbot/model/AppleApp.java
index cedeb03..3463b99 100644
--- a/src/main/java/com/miti99/storescraperbot/model/AppleApp.java
+++ b/src/main/java/com/miti99/storescraperbot/model/AppleApp.java
@@ -9,4 +9,8 @@ import lombok.Setter;
 public class AppleApp extends AbstractModel<String> {
   long cacheTime;
   AppleAppResponse rawResponse;
+
+  public AppleApp(String key) {
+    super(key);
+  }
 }
diff --git a/src/main/java/com/miti99/storescraperbot/model/GoogleApp.java b/src/main/java/com/miti99/storescraperbot/model/GoogleApp.java
index e18f7dd..a6d7903 100644
--- a/src/main/java/com/miti99/storescraperbot/model/GoogleApp.java
+++ b/src/main/java/com/miti99/storescraperbot/model/GoogleApp.java
@@ -9,4 +9,8 @@ import lombok.Setter;
 public class GoogleApp extends AbstractModel<String> {
   long cacheTime;
   GoogleAppResponse rawResponse;
+
+  public GoogleApp(String key) {
+    super(key);
+  }
 }
diff --git a/src/main/java/com/miti99/storescraperbot/model/Group.java b/src/main/java/com/miti99/storescraperbot/model/Group.java
index 70edef3..609aea5 100644
--- a/src/main/java/com/miti99/storescraperbot/model/Group.java
+++ b/src/main/java/com/miti99/storescraperbot/model/Group.java
@@ -11,6 +11,10 @@ import lombok.Setter;
 public class Group extends AbstractModel<Long> {
   List<App> apps;
 
+  public Group(Long key) {
+    super(key);
+  }
+
   public static class App {
     String appId;
     AppType type;
diff --git a/src/main/java/com/miti99/storescraperbot/repository/AbstractRepository.java b/src/main/java/com/miti99/storescraperbot/repository/AbstractRepository.java
index adffca0..5be7b34 100644
--- a/src/main/java/com/miti99/storescraperbot/repository/AbstractRepository.java
+++ b/src/main/java/com/miti99/storescraperbot/repository/AbstractRepository.java
@@ -1,29 +1,32 @@
 package com.miti99.storescraperbot.repository;
 
-import com.couchbase.client.java.Collection;
+import com.google.common.base.CaseFormat;
 import com.miti99.storescraperbot.config.Config;
+import com.miti99.storescraperbot.constant.Constant;
 import com.miti99.storescraperbot.model.AbstractModel;
-import com.miti99.storescraperbot.util.CouchbaseUtil;
+import com.miti99.storescraperbot.util.GsonUtil;
+import com.miti99.storescraperbot.util.RedisUtil;
 import java.lang.reflect.ParameterizedType;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
 import lombok.extern.log4j.Log4j2;
 
-/** 1 repository = 1 collection */
 @Log4j2
+@NoArgsConstructor(access = AccessLevel.PROTECTED)
 public abstract class AbstractRepository<K, V extends AbstractModel<K>> {
-  public static final String SEPARATOR = "_";
-  // protected static ObjectMapper objectMapper = new ObjectMapper();
+  public static final String SEPARATOR = ":";
+  protected final Class<K> classK = getKeyClass();
   protected final Class<V> classV = getDataClass();
-  // protected final JavaType type = objectMapper.getTypeFactory().constructType(classV);
-  protected final String scopeName = Config.ENV.name().toLowerCase();
-  protected final String collectionName;
+  protected final String prefix =
+      String.join(
+          SEPARATOR,
+          Constant.APP_NAME,
+          Config.ENV.name().toLowerCase(),
+          CaseFormat.UPPER_CAMEL.to(CaseFormat.LOWER_UNDERSCORE, classV.getSimpleName()));
 
-  protected AbstractRepository(String collectionName) {
-    this.collectionName = collectionName.toLowerCase();
-    CouchbaseUtil.createCollection(scopeName, collectionName);
-  }
-
-  public Collection collection() {
-    return CouchbaseUtil.BUCKET.scope(scopeName).collection(collectionName);
+  protected Class<K> getKeyClass() {
+    return (Class<K>)
+        ((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0];
   }
 
   /**
@@ -43,7 +46,7 @@ public abstract class AbstractRepository<K, V extends AbstractModel<K>> {
       if (exist(key)) {
         return;
       }
-      V data = classV.getDeclaredConstructor().newInstance();
+      V data = classV.getDeclaredConstructor(classK).newInstance(key);
       save(key, data);
     } catch (Exception e) {
       log.error("Error while initializing data", e);
@@ -51,13 +54,14 @@ public abstract class AbstractRepository<K, V extends AbstractModel<K>> {
   }
 
   protected String getDatabaseKey(K key) {
-    return String.join(SEPARATOR, classV.getSimpleName(), String.valueOf(key));
+    return String.join(SEPARATOR, prefix, String.valueOf(key));
   }
 
   public void save(K key, V data) {
     var databaseKey = getDatabaseKey(key);
-    try {
-      collection().upsert(databaseKey, data);
+    try (var jedis = RedisUtil.getJedis()) {
+      var json = GsonUtil.toJson(data);
+      jedis.set(databaseKey, json);
     } catch (Exception e) {
       log.error("save error - key {}, databaseKey {}", key, databaseKey, e);
     }
@@ -65,8 +69,8 @@ public abstract class AbstractRepository<K, V extends AbstractModel<K>> {
 
   public boolean exist(K key) {
     var databaseKey = getDatabaseKey(key);
-    try {
-      return collection().exists(databaseKey).exists();
+    try (var jedis = RedisUtil.getJedis()) {
+      return jedis.exists(databaseKey);
     } catch (Exception e) {
       log.error("exist error - key {}, databaseKey {}", key, databaseKey, e);
       return false;
@@ -75,12 +79,9 @@ public abstract class AbstractRepository<K, V extends AbstractModel<K>> {
 
   public V load(K key) {
     var databaseKey = getDatabaseKey(key);
-    try {
-      var getResult = collection().get(databaseKey);
-      if (getResult == null) {
-        return null;
-      }
-      return getResult.contentAs(classV);
+    try (var jedis = RedisUtil.getJedis()) {
+      var json = jedis.get(databaseKey);
+      return GsonUtil.fromJson(json, classV);
     } catch (Exception e) {
       log.error("load error - key {}, databaseKey {}", key, databaseKey, e);
       return null;
@@ -89,8 +90,8 @@ public abstract class AbstractRepository<K, V extends AbstractModel<K>> {
 
   public void delete(K key) {
     var databaseKey = getDatabaseKey(key);
-    try {
-      collection().remove(databaseKey);
+    try (var jedis = RedisUtil.getJedis()) {
+      jedis.del(databaseKey);
     } catch (Exception e) {
       log.error("delete error", e);
     }
diff --git a/src/main/java/com/miti99/storescraperbot/repository/AdminRepository.java b/src/main/java/com/miti99/storescraperbot/repository/AdminRepository.java
index 03f447f..4f29514 100644
--- a/src/main/java/com/miti99/storescraperbot/repository/AdminRepository.java
+++ b/src/main/java/com/miti99/storescraperbot/repository/AdminRepository.java
@@ -2,14 +2,12 @@ package com.miti99.storescraperbot.repository;
 
 import com.miti99.storescraperbot.model.Admin;
 
-/**
- * Đây là repository chỉ chứa 1 key duy nhất, key là "" (rỗng)
- */
+/** Đây là repository chỉ chứa 1 key duy nhất, key là "" (rỗng) */
 public class AdminRepository extends AbstractRepository<String, Admin> {
   public static final AdminRepository INSTANCE = new AdminRepository();
 
   protected AdminRepository() {
-    super("admin");
+    super();
   }
 
   public void init() {
diff --git a/src/main/java/com/miti99/storescraperbot/repository/AppleAppRepository.java b/src/main/java/com/miti99/storescraperbot/repository/AppleAppRepository.java
index 913594b..d8b0ae4 100644
--- a/src/main/java/com/miti99/storescraperbot/repository/AppleAppRepository.java
+++ b/src/main/java/com/miti99/storescraperbot/repository/AppleAppRepository.java
@@ -1,12 +1,7 @@
 package com.miti99.storescraperbot.repository;
 
 import com.miti99.storescraperbot.model.AppleApp;
-import com.miti99.storescraperbot.model.Group;
 
 public class AppleAppRepository extends AbstractRepository<String, AppleApp> {
   public static final AppleAppRepository INSTANCE = new AppleAppRepository();
-
-  protected AppleAppRepository() {
-    super("apple");
-  }
 }
diff --git a/src/main/java/com/miti99/storescraperbot/repository/GoogleAppRepository.java b/src/main/java/com/miti99/storescraperbot/repository/GoogleAppRepository.java
index 2a4eaf4..8c2186f 100644
--- a/src/main/java/com/miti99/storescraperbot/repository/GoogleAppRepository.java
+++ b/src/main/java/com/miti99/storescraperbot/repository/GoogleAppRepository.java
@@ -1,12 +1,7 @@
 package com.miti99.storescraperbot.repository;
 
 import com.miti99.storescraperbot.model.GoogleApp;
-import com.miti99.storescraperbot.model.Group;
 
 public class GoogleAppRepository extends AbstractRepository<String, GoogleApp> {
   private static final GoogleAppRepository INSTANCE = new GoogleAppRepository();
-
-  protected GoogleAppRepository() {
-    super("google");
-  }
 }
diff --git a/src/main/java/com/miti99/storescraperbot/repository/GroupRepository.java b/src/main/java/com/miti99/storescraperbot/repository/GroupRepository.java
index d72efde..a47798e 100644
--- a/src/main/java/com/miti99/storescraperbot/repository/GroupRepository.java
+++ b/src/main/java/com/miti99/storescraperbot/repository/GroupRepository.java
@@ -4,8 +4,4 @@ import com.miti99.storescraperbot.model.Group;
 
 public class GroupRepository extends AbstractRepository<Long, Group> {
   public static final GroupRepository INSTANCE = new GroupRepository();
-
-  protected GroupRepository() {
-    super("group");
-  }
 }
diff --git a/src/main/java/com/miti99/storescraperbot/util/CouchbaseUtil.java b/src/main/java/com/miti99/storescraperbot/util/CouchbaseUtil.java
deleted file mode 100644
index 20487f6..0000000
--- a/src/main/java/com/miti99/storescraperbot/util/CouchbaseUtil.java
+++ /dev/null
@@ -1,81 +0,0 @@
-package com.miti99.storescraperbot.util;
-
-import static com.miti99.storescraperbot.config.Config.COUCHBASE_BUCKET_NAME;
-import static com.miti99.storescraperbot.config.Config.COUCHBASE_CONNECTION_STRING;
-import static com.miti99.storescraperbot.config.Config.COUCHBASE_PASSWORD;
-import static com.miti99.storescraperbot.config.Config.COUCHBASE_USERNAME;
-
-import com.couchbase.client.java.Bucket;
-import com.couchbase.client.java.Cluster;
-import com.couchbase.client.java.ClusterOptions;
-import com.couchbase.client.java.manager.collection.CollectionSpec;
-import com.miti99.storescraperbot.config.Config;
-import java.time.Duration;
-import lombok.extern.log4j.Log4j2;
-
-@Log4j2
-public class CouchbaseUtil {
-  public static final Cluster CLUSTER;
-  public static final Bucket BUCKET;
-
-  static {
-    CLUSTER =
-        Cluster.connect(
-            COUCHBASE_CONNECTION_STRING,
-            ClusterOptions.clusterOptions(COUCHBASE_USERNAME, COUCHBASE_PASSWORD)
-                .environment(env -> {}));
-
-    BUCKET = CLUSTER.bucket(COUCHBASE_BUCKET_NAME);
-    BUCKET.waitUntilReady(Duration.ofSeconds(10));
-  }
-
-  public static void createScope(String scopeName) {
-    var collectionManager = BUCKET.collections();
-    try {
-      boolean scopeExists =
-          collectionManager.getAllScopes().stream().anyMatch(s -> s.name().equals(scopeName));
-
-      if (!scopeExists) {
-        collectionManager.createScope(scopeName);
-        log.info("Scope created: {}", scopeName);
-      } else {
-        log.info("Scope existed: {}", scopeName);
-      }
-    } catch (Exception e) {
-      log.error("createScope error - scopeName: '{}'", scopeName, e);
-    }
-  }
-
-  public static void createCollection(String scopeName, String collectionName) {
-    var collectionManager = BUCKET.collections();
-    try {
-      var scopeSpecOpt =
-          collectionManager.getAllScopes().stream()
-              .filter(s -> s.name().equals(scopeName))
-              .findFirst();
-      if (scopeSpecOpt.isEmpty()) {
-        createScope(scopeName);
-        createCollection(scopeName, collectionName);
-        return;
-      }
-
-      var scopeSpec = scopeSpecOpt.get();
-      boolean collectionExists =
-          scopeSpec.collections().stream().anyMatch(c -> c.name().equals(collectionName));
-
-      if (!collectionExists) {
-        var spec = CollectionSpec.create(collectionName, scopeName);
-        collectionManager.createCollection(spec);
-        log.info("Collection created: {} in {}", collectionName, scopeName);
-      } else {
-        log.info("Collection existed: {} in {}", collectionName, scopeName);
-      }
-    } catch (Exception e) {
-      log.error(
-          "createCollection error - collectionName: '{}', scopeName: '{}'",
-          collectionName,
-          scopeName,
-          e);
-    }
-  }
-}
diff --git a/src/main/java/com/miti99/storescraperbot/util/GsonUtil.java b/src/main/java/com/miti99/storescraperbot/util/GsonUtil.java
new file mode 100644
index 0000000..d8e5718
--- /dev/null
+++ b/src/main/java/com/miti99/storescraperbot/util/GsonUtil.java
@@ -0,0 +1,18 @@
+package com.miti99.storescraperbot.util;
+
+import com.google.gson.Gson;
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class GsonUtil {
+  public static final Gson GSON = new Gson();
+
+  public static <T> T fromJson(String input, Class<T> valueType) {
+    return GSON.fromJson(input, valueType);
+  }
+
+  public static String toJson(Object input) {
+    return GSON.toJson(input);
+  }
+}
diff --git a/src/main/java/com/miti99/storescraperbot/util/JacksonUtil.java b/src/main/java/com/miti99/storescraperbot/util/JacksonUtil.java
deleted file mode 100644
index de46f13..0000000
--- a/src/main/java/com/miti99/storescraperbot/util/JacksonUtil.java
+++ /dev/null
@@ -1,47 +0,0 @@
-package com.miti99.storescraperbot.util;
-
-import com.fasterxml.jackson.annotation.JsonAutoDetect.Visibility;
-import com.fasterxml.jackson.annotation.JsonInclude.Include;
-import com.fasterxml.jackson.annotation.PropertyAccessor;
-import com.fasterxml.jackson.core.JsonParser.Feature;
-import com.fasterxml.jackson.databind.DeserializationFeature;
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.fasterxml.jackson.databind.SerializationFeature;
-import lombok.SneakyThrows;
-
-public class JacksonUtil {
-  public static ObjectMapper MAPPER = objectMapper();
-
-  private static ObjectMapper objectMapper() {
-    var objectMapper = new ObjectMapper();
-
-    objectMapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
-    objectMapper.disable(
-        SerializationFeature.FAIL_ON_EMPTY_BEANS,
-        SerializationFeature.INDENT_OUTPUT,
-        SerializationFeature.WRITE_DATES_AS_TIMESTAMPS);
-
-    objectMapper.enable(
-        DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT,
-        DeserializationFeature.ACCEPT_SINGLE_VALUE_AS_ARRAY,
-        DeserializationFeature.READ_UNKNOWN_ENUM_VALUES_AS_NULL);
-    objectMapper.enable(
-        Feature.ALLOW_SINGLE_QUOTES, Feature.ALLOW_UNQUOTED_FIELD_NAMES, Feature.IGNORE_UNDEFINED);
-    objectMapper.enable(SerializationFeature.WRITE_ENUMS_USING_TO_STRING);
-
-    objectMapper.setSerializationInclusion(Include.NON_NULL);
-    objectMapper.setVisibility(PropertyAccessor.FIELD, Visibility.ANY);
-
-    return objectMapper;
-  }
-
-  @SneakyThrows
-  public static <T> T readValue(String input, Class<T> valueType) {
-    return MAPPER.readValue(input, valueType);
-  }
-
-  @SneakyThrows
-  public static String writeValueAsString(Object input) {
-    return MAPPER.writeValueAsString(input);
-  }
-}
diff --git a/src/main/java/com/miti99/storescraperbot/util/RedisUtil.java b/src/main/java/com/miti99/storescraperbot/util/RedisUtil.java
new file mode 100644
index 0000000..78143cc
--- /dev/null
+++ b/src/main/java/com/miti99/storescraperbot/util/RedisUtil.java
@@ -0,0 +1,17 @@
+package com.miti99.storescraperbot.util;
+
+import static com.miti99.storescraperbot.config.Config.REDIS_URL;
+
+import lombok.AccessLevel;
+import lombok.NoArgsConstructor;
+import redis.clients.jedis.Jedis;
+import redis.clients.jedis.JedisPool;
+
+@NoArgsConstructor(access = AccessLevel.PRIVATE)
+public class RedisUtil {
+  private static final JedisPool REDIS_POOL = new JedisPool(REDIS_URL);
+
+  public static Jedis getJedis() {
+    return REDIS_POOL.getResource();
+  }
+}
diff --git a/src/test/java/com/miti99/storescraperbot/api/apple/AppStoreScraperTest.java b/src/test/java/com/miti99/storescraperbot/api/apple/AppStoreScraperTest.java
index 9a32b53..931b9a5 100644
--- a/src/test/java/com/miti99/storescraperbot/api/apple/AppStoreScraperTest.java
+++ b/src/test/java/com/miti99/storescraperbot/api/apple/AppStoreScraperTest.java
@@ -1,9 +1,7 @@
 package com.miti99.storescraperbot.api.apple;
 
-import static org.junit.jupiter.api.Assertions.*;
-
 import com.miti99.storescraperbot.api.apple.request.AppleAppRequest;
-import com.miti99.storescraperbot.util.JacksonUtil;
+import com.miti99.storescraperbot.util.GsonUtil;
 import org.junit.jupiter.api.Test;
 
 class AppStoreScraperTest {
@@ -11,6 +9,6 @@ class AppStoreScraperTest {
   void testApp() {
     var request = new AppleAppRequest("com.mpt.kvtm");
     var response = AppStoreScraper.app(request);
-    System.out.println(JacksonUtil.writeValueAsString(response));
+    System.out.println(GsonUtil.toJson(response));
   }
 }
diff --git a/src/test/java/com/miti99/storescraperbot/api/google/GooglePlayScraperTest.java b/src/test/java/com/miti99/storescraperbot/api/google/GooglePlayScraperTest.java
index e9da330..26cc8b9 100644
--- a/src/test/java/com/miti99/storescraperbot/api/google/GooglePlayScraperTest.java
+++ b/src/test/java/com/miti99/storescraperbot/api/google/GooglePlayScraperTest.java
@@ -1,9 +1,7 @@
 package com.miti99.storescraperbot.api.google;
 
-import static org.junit.jupiter.api.Assertions.*;
-
 import com.miti99.storescraperbot.api.google.request.GoogleAppRequest;
-import com.miti99.storescraperbot.util.JacksonUtil;
+import com.miti99.storescraperbot.util.GsonUtil;
 import org.junit.jupiter.api.Test;
 
 class GooglePlayScraperTest {
@@ -11,6 +9,6 @@ class GooglePlayScraperTest {
   void testApp() {
     var request = new GoogleAppRequest("vn.kvtm.js");
     var response = GooglePlayScraper.app(request);
-    System.out.println(JacksonUtil.writeValueAsString(response));
+    System.out.println(GsonUtil.toJson(response));
   }
 }