diff --git a/CHANGELOG.md b/CHANGELOG.md
index 58112450..14038a1e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,11 +1,35 @@
 # Table of Contents
 
+- [v3.0.4](#v304): 2023-04-24
 - [v3.0.3](#v303): 2023-01-03
 - [v3.0.2](#v302): 2022-12-18
 - [v3.0.1](#v301): 2022-12-16
 - [v3.0.0](#v300): 2022-12-14
 - [v2.9.0](#v290): 2022-02-20
 
+# v3.0.4
+
+## Dependencies
+
+- ⬆️ Upgrade: dependency `selenium-java` from `4.6.0` to `4.9.0`
+- ⬆️ Upgrade: dependency `lombok` from `1.18.24` to `1.18.26`
+- ⬆️ Upgrade: dependency `logback-classic` from `1.4.5` to `1.4.7`
+- ⬆️ Upgrade: dependency `slf4j-api` from `2.0.6` to `2.0.7`
+- ⬆️ Upgrade: dependency `annotations` from `23.1.0` to `24.0.1`
+- ⬆️ Upgrade: dependency `progressbar` from `0.9.4` to `0.9.5`
+- ⬆️ Upgrade: dependency `mapstruct-plugin` from `1.5.3.Final` to `1.5.5.Final`
+- ⬆️ Upgrade: test dependency `junit5` from `5.9.1` to `5.9.2`
+- ⬆️ Upgrade: test dependency `assertj-core` from `3.23.1` to `3.24.2`
+- ⬆️ Upgrade: test dependency `mockito-inline` from `4.11.0` to `5.2.0`
+- ⬆️ Upgrade: build dependency `maven-compiler-plugin` from `3.10.1` to `3.11.0`
+- ⬆️ Upgrade: build dependency `maven-assembly-plugin` from `3.3.0` to `3.5.0`
+- ⬆️ Upgrade: build dependency `jacoco-maven-plugin` from `0.8.8` to `0.8.9`
+
+## Troubleshooting
+
+- 🐞 Fix: IOException ... Invalid Status code=403 text=Forbidden
+- 🐞 Fix: SessionNotCreatedException ... Could not start a new session. Response code 500
+
 # v3.0.3
 
 ## Dependencies
@@ -20,7 +44,7 @@
 ## Troubleshooting
 
 - 🐞 Fix: termination of application
-- 🐞 Fix: unreproducible issue that failure to get image count
+- 🐞 Fix: failure to get image count on locale KOREA
 
 # v3.0.2
 
diff --git a/README.md b/README.md
index 036838fd..a8161ff9 100644
--- a/README.md
+++ b/README.md
@@ -7,22 +7,22 @@
 <p align="center">Downloader for lezhin comics</p>
 
 <p align="center">
-    <a href="https://sonarcloud.io/summary/new_code?id=ImSejin_lezhin-comics-downloader">
-        <img alt="Sonarcloud Security Rating" src="https://sonarcloud.io/api/project_badges/measure?project=ImSejin_lezhin-comics-downloader&metric=security_rating"/>
+    <img alt="GitHub All Releases" src="https://img.shields.io/github/downloads/imsejin/lezhin-comics-downloader/total?style=flat">
+    <img alt="GitHub Releases" src="https://img.shields.io/github/downloads/imsejin/lezhin-comics-downloader/latest/total?style=flat">
+    <a href="https://github.com/ImSejin/lezhin-comics-downloader/releases/latest">
+        <img alt="Latest release" src="https://img.shields.io/github/v/release/ImSejin/lezhin-comics-downloader?color=orange&style=flat">
+    </a>
+    <br/>
+    <a href="https://sonarcloud.io/summary/overall?id=ImSejin_lezhin-comics-downloader">
+        <img alt="Sonarcloud Quality Gate Status" src="https://sonarcloud.io/api/project_badges/measure?project=ImSejin_lezhin-comics-downloader&metric=alert_status"/>
     </a>
-    <a href="https://sonarcloud.io/summary/new_code?id=ImSejin_lezhin-comics-downloader">
+    <a href="https://sonarcloud.io/summary/overall?id=ImSejin_lezhin-comics-downloader">
         <img alt="Sonarcloud Maintainability Rating" src="https://sonarcloud.io/api/project_badges/measure?project=ImSejin_lezhin-comics-downloader&metric=sqale_rating"/>
     </a>
     <a href="https://app.codacy.com/gh/ImSejin/lezhin-comics-downloader/dashboard">
         <img alt="Codacy grade" src="https://img.shields.io/codacy/grade/1a2400c31a8346ddbf108fb3ac78f481?style=flat&logo=codacy">
     </a>
     <img alt="jdk11" src="https://img.shields.io/badge/jdk-11-orange?style=flat">
-    <br/>
-    <img alt="GitHub All Releases" src="https://img.shields.io/github/downloads/imsejin/lezhin-comics-downloader/total?style=flat">
-    <img alt="GitHub Releases" src="https://img.shields.io/github/downloads/imsejin/lezhin-comics-downloader/latest/total?style=flat">
-    <a href="https://github.com/ImSejin/lezhin-comics-downloader/releases/latest">
-        <img alt="Latest release" src="https://img.shields.io/github/v/release/ImSejin/lezhin-comics-downloader?color=orange&style=flat">
-    </a>
 </p>
 
 # Preview
diff --git a/pom.xml b/pom.xml
index ca28e864..55d01ac5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>io.github.imsejin</groupId>
     <artifactId>lezhin-comics-downloader</artifactId>
-    <version>3.0.3</version>
+    <version>3.0.4</version>
     <packaging>jar</packaging>
 
     <name>Lezhin Comics Downloader</name>
@@ -43,21 +43,21 @@
         <!-- Dependency versions -->
         <common-utils.version>0.14.0</common-utils.version>
         <commons-cli.version>1.5.0</commons-cli.version>
-        <progressbar.version>0.9.4</progressbar.version>
+        <progressbar.version>0.9.5</progressbar.version>
         <reftrofit.version>2.9.0</reftrofit.version>
-        <selenium.version>4.6.0</selenium.version>
+        <selenium.version>4.9.0</selenium.version>
         <reflections.version>0.10.2</reflections.version>
-        <lombok.version>1.18.24</lombok.version>
-        <mapstruct.version>1.5.3.Final</mapstruct.version>
-        <jetbrains-annotations.version>23.1.0</jetbrains-annotations.version>
-        <logback-classic.version>1.4.5</logback-classic.version>
-        <slf4j-api.version>2.0.6</slf4j-api.version>
+        <lombok.version>1.18.26</lombok.version>
+        <mapstruct.version>1.5.5.Final</mapstruct.version>
+        <jetbrains-annotations.version>24.0.1</jetbrains-annotations.version>
+        <logback-classic.version>1.4.7</logback-classic.version>
+        <slf4j-api.version>2.0.7</slf4j-api.version>
 
         <!-- Test dependency versions -->
-        <junit5.version>5.9.1</junit5.version>
-        <assertj.version>3.23.1</assertj.version>
+        <junit5.version>5.9.2</junit5.version>
+        <assertj.version>3.24.2</assertj.version>
         <spock.version>2.3-groovy-4.0</spock.version>
-        <mockito.version>4.11.0</mockito.version>
+        <mockito.version>5.2.0</mockito.version>
     </properties>
 
     <!-- Enables to build on development environment -->
@@ -133,6 +133,11 @@
                 </exclusion>
             </exclusions>
         </dependency>
+        <dependency>
+            <groupId>org.seleniumhq.selenium</groupId>
+            <artifactId>selenium-http-jdk-client</artifactId>
+            <version>${selenium.version}</version>
+        </dependency>
 
         <!-- Reflections -->
         <dependency>
@@ -271,7 +276,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.10.1</version>
+                <version>3.11.0</version>
                 <configuration>
                     <source>${java.version}</source>
                     <target>${java.version}</target>
@@ -306,7 +311,7 @@
                     <testFailureIgnore>false</testFailureIgnore>
                     <!--
                         Only required if names of test classes don't match default Surefire patterns('*Test').
-                        By default only files ending in 'Test' will be included,
+                        By default, only files ending with 'Test' will be included,
                         so also include support for Spock style naming convention.
 
                         Oddly enough for Groovy files, '*Spec.groovy' does not work, but '*Spec.java'.
@@ -352,7 +357,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-assembly-plugin</artifactId>
-                <version>3.4.2</version>
+                <version>3.5.0</version>
                 <executions>
                     <execution>
                         <id>create-jar</id>
@@ -387,7 +392,7 @@
             <plugin>
                 <groupId>org.jacoco</groupId>
                 <artifactId>jacoco-maven-plugin</artifactId>
-                <version>0.8.8</version>
+                <version>0.8.9</version>
                 <executions>
                     <execution>
                         <goals>
diff --git a/src/main/java/io/github/imsejin/dl/lezhin/Application.java b/src/main/java/io/github/imsejin/dl/lezhin/Application.java
index dee632ad..82f7e13d 100644
--- a/src/main/java/io/github/imsejin/dl/lezhin/Application.java
+++ b/src/main/java/io/github/imsejin/dl/lezhin/Application.java
@@ -59,8 +59,8 @@ public static void main(String[] args) {
                 Object attribute = processor.process(context);
                 context.add(attribute);
             }
-        } catch (Exception e) {
-            Loggers.getLogger().error("Failed to perform a process", e);
+        } catch (Throwable t) {
+            Loggers.getLogger().error("Failed to perform a process", t);
         } finally {
             WebBrowser.quitIfInitialized();
         }
diff --git a/src/main/java/io/github/imsejin/dl/lezhin/browser/ChromeOption.java b/src/main/java/io/github/imsejin/dl/lezhin/browser/ChromeOption.java
new file mode 100644
index 00000000..fc8894b0
--- /dev/null
+++ b/src/main/java/io/github/imsejin/dl/lezhin/browser/ChromeOption.java
@@ -0,0 +1,112 @@
+package io.github.imsejin.dl.lezhin.browser;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+import java.util.Arrays;
+import java.util.List;
+
+import static java.util.stream.Collectors.toList;
+
+/**
+ * @since 2.6.2
+ */
+@Getter
+@RequiredArgsConstructor
+public enum ChromeOption {
+
+    /**
+     * Opens browser on private mode.
+     */
+    INCOGNITO("--incognito"),
+
+    /**
+     * Runs browser using CLI.
+     */
+    HEADLESS("--headless=new"),
+
+    /**
+     * Bypasses OS security model.
+     *
+     * @since 2.8.2
+     */
+    NO_SANDBOX("--no-sandbox"),
+
+    /**
+     * Disables GPU computation (applicable to Windows OS only).
+     *
+     * @since 2.8.2
+     */
+    DISABLE_GPU("--disable-gpu"),
+
+    /**
+     * Ignores certificate errors.
+     */
+    IGNORE_CERTIFICATE_ERRORS("--ignore-certificate-errors"),
+
+    /**
+     * Disables to check if Google Chrome is default browser on your device.
+     *
+     * @since 2.8.2
+     */
+    NO_DEFAULT_BROWSER_CHECK("--no-default-browser-check"),
+
+    /**
+     * Disables popup blocking.
+     */
+    DISABLE_POPUP_BLOCKING("--disable-popup-blocking"),
+
+    /**
+     * Disables installed extensions(plugins) of Google Chrome.
+     *
+     * @since 2.8.2
+     */
+    DISABLE_EXTENSIONS("--disable-extensions"),
+
+    /**
+     * Disables default web apps on Google Chrome’s new tab page
+     * <p>
+     * Chrome Web Store, Google Drive, Gmail, YouTube, Google Search, etc.
+     */
+    DISABLE_DEFAULT_APPS("--disable-default-apps"),
+
+    /**
+     * Disables Google translate feature.
+     *
+     * @since 2.8.2
+     */
+    DISABLE_TRANSLATE("--disable-translate"),
+
+    /**
+     * Disables detection for client side phishing.
+     *
+     * @since 2.8.2
+     */
+    DISABLE_CLIENT_SIDE_PHISHING_DETECTION("--disable-client-side-phishing-detection"),
+
+    /**
+     * Overcomes limited resource problems.
+     *
+     * @since 2.8.2
+     */
+    DISABLE_DEV_SHM_USAGE("--disable-dev-shm-usage"),
+
+    /**
+     * Allows all remote origins.
+     *
+     * @since 3.0.4
+     */
+    REMOTE_ALLOW_ALL_ORIGINS("--remote-allow-origins=*"),
+
+    /**
+     * Opens browser in maximized mode.
+     */
+    START_MAXIMIZED("--start-maximized");
+
+    private final String argument;
+
+    public static List<String> getArguments() {
+        return Arrays.stream(values()).map(it -> it.argument).collect(toList());
+    }
+
+}
diff --git a/src/main/java/io/github/imsejin/dl/lezhin/browser/WebBrowser.java b/src/main/java/io/github/imsejin/dl/lezhin/browser/WebBrowser.java
index 073fed13..1b2da1f1 100644
--- a/src/main/java/io/github/imsejin/dl/lezhin/browser/WebBrowser.java
+++ b/src/main/java/io/github/imsejin/dl/lezhin/browser/WebBrowser.java
@@ -23,8 +23,6 @@
 import io.github.imsejin.dl.lezhin.exception.ChromeDriverNotFoundException;
 import io.github.imsejin.dl.lezhin.exception.WebBrowserNotRunningException;
 import io.github.imsejin.dl.lezhin.util.PathUtils;
-import lombok.Getter;
-import lombok.RequiredArgsConstructor;
 import org.jetbrains.annotations.Nullable;
 import org.openqa.selenium.By;
 import org.openqa.selenium.TimeoutException;
@@ -44,14 +42,11 @@
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.time.Duration;
-import java.util.Arrays;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.stream.Stream;
 
-import static java.util.stream.Collectors.toList;
-
 /**
  * @since 2.0.0
  */
@@ -110,6 +105,8 @@ public static void debugging() {
 
         // Sets up pathname of web driver.
         System.setProperty(ChromeDriverService.CHROME_DRIVER_EXE_PROPERTY, chromeDriverPath.toString());
+        // See: https://github.com/SeleniumHQ/selenium/issues/11750
+        System.setProperty("webdriver.http.factory", "jdk-http-client");
     }
 
     @ExcludeFromGeneratedJacocoReport
@@ -122,7 +119,7 @@ private static final class SingletonLazyHolder {
             WebBrowser.initialized = true;
         }
 
-        private static final RemoteWebDriver DRIVER = new ChromeDriver(options);
+        private static final RemoteWebDriver DRIVER = new ChromeDriver(WebBrowser.options);
     }
 
     public static RemoteWebDriver getDriver() {
@@ -250,100 +247,4 @@ public static <T> T evaluate(String javascript, Class<T> expected) {
         return null;
     }
 
-    // Driver Options ----------------------------------------------------------------------------------
-
-    /**
-     * @since 2.6.2
-     */
-    @Getter
-    @RequiredArgsConstructor
-    private enum ChromeOption {
-        /**
-         * Opens browser in maximized mode.
-         */
-        START_MAXIMIZED("--start-maximized"),
-
-        /**
-         * Opens browser on private mode.
-         */
-        INCOGNITO("--incognito"),
-
-        /**
-         * Runs browser using CLI.
-         */
-        HEADLESS("--headless"),
-
-        /**
-         * Bypasses OS security model.
-         *
-         * @since 2.8.2
-         */
-        NO_SANDBOX("--no-sandbox"),
-
-        /**
-         * Disables GPU computation (applicable to Windows OS only).
-         *
-         * @since 2.8.2
-         */
-        DISABLE_GPU("--disable-gpu"),
-
-        /**
-         * Ignores certificate errors.
-         */
-        IGNORE_CERTIFICATE_ERRORS("--ignore-certificate-errors"),
-
-        /**
-         * Disables to check if Google Chrome is default browser on your device.
-         *
-         * @since 2.8.2
-         */
-        NO_DEFAULT_BROWSER_CHECK("--no-default-browser-check"),
-
-        /**
-         * Disables popup blocking.
-         */
-        DISABLE_POPUP_BLOCKING("--disable-popup-blocking"),
-
-        /**
-         * Disables installed extensions(plugins) of Google Chrome.
-         *
-         * @since 2.8.2
-         */
-        DISABLE_EXTENSIONS("--disable-extensions"),
-
-        /**
-         * Disables default web apps on Google Chrome’s new tab page
-         * <p>
-         * Chrome Web Store, Google Drive, Gmail, YouTube, Google Search, etc.
-         */
-        DISABLE_DEFAULT_APPS("--disable-default-apps"),
-
-        /**
-         * Disables Google translate feature.
-         *
-         * @since 2.8.2
-         */
-        DISABLE_TRANSLATE("--disable-translate"),
-
-        /**
-         * Disables detection for client side phishing.
-         *
-         * @since 2.8.2
-         */
-        DISABLE_CLIENT_SIDE_PHISHING_DETECTION("--disable-client-side-phishing-detection"),
-
-        /**
-         * Overcomes limited resource problems.
-         *
-         * @since 2.8.2
-         */
-        DISABLE_DEV_SHM_USAGE("--disable-dev-shm-usage");
-
-        private final String argument;
-
-        public static List<String> getArguments() {
-            return Arrays.stream(values()).map(it -> it.argument).collect(toList());
-        }
-    }
-
 }
diff --git a/src/main/java/io/github/imsejin/dl/lezhin/exception/ImageCountNotFoundException.java b/src/main/java/io/github/imsejin/dl/lezhin/exception/ImageCountNotFoundException.java
new file mode 100644
index 00000000..01b8358a
--- /dev/null
+++ b/src/main/java/io/github/imsejin/dl/lezhin/exception/ImageCountNotFoundException.java
@@ -0,0 +1,25 @@
+/*
+ * Copyright 2023 Sejin Im
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.github.imsejin.dl.lezhin.exception;
+
+public class ImageCountNotFoundException extends RuntimeException {
+
+    public ImageCountNotFoundException(String format, Object... args) {
+        super(String.format(format, args));
+    }
+
+}
diff --git a/src/main/java/io/github/imsejin/dl/lezhin/process/ProcessContext.java b/src/main/java/io/github/imsejin/dl/lezhin/process/ProcessContext.java
index 581b184d..e8115aa6 100644
--- a/src/main/java/io/github/imsejin/dl/lezhin/process/ProcessContext.java
+++ b/src/main/java/io/github/imsejin/dl/lezhin/process/ProcessContext.java
@@ -57,6 +57,7 @@
 @ToString
 @ThreadSafe
 @EqualsAndHashCode
+@SuppressWarnings("unused")
 @NoArgsConstructor(access = AccessLevel.PRIVATE)
 public final class ProcessContext {
 
diff --git a/src/main/java/io/github/imsejin/dl/lezhin/process/framework/ProcessorCreator.java b/src/main/java/io/github/imsejin/dl/lezhin/process/framework/ProcessorCreator.java
index 9e3efb82..a4c611f9 100644
--- a/src/main/java/io/github/imsejin/dl/lezhin/process/framework/ProcessorCreator.java
+++ b/src/main/java/io/github/imsejin/dl/lezhin/process/framework/ProcessorCreator.java
@@ -50,7 +50,7 @@ public List<Processor> create(List<Class<? extends Processor>> processorTypes) t
     // -------------------------------------------------------------------------------------------------
 
     private Constructor<?> resolveConstructor(Class<? extends Processor> processorType) throws ProcessorCreationException {
-        // Resolves a constructor that has less number of parameters first.
+        // Resolves a constructor that has fewer number of parameters first.
         List<Constructor<?>> constructors = Arrays.stream(processorType.getDeclaredConstructors())
                 .sorted(comparing(Constructor::getParameterCount)).collect(toList());
 
diff --git a/src/main/java/io/github/imsejin/dl/lezhin/process/impl/DownloadProcessor.java b/src/main/java/io/github/imsejin/dl/lezhin/process/impl/DownloadProcessor.java
index 7d50702d..83120e86 100644
--- a/src/main/java/io/github/imsejin/dl/lezhin/process/impl/DownloadProcessor.java
+++ b/src/main/java/io/github/imsejin/dl/lezhin/process/impl/DownloadProcessor.java
@@ -16,6 +16,7 @@
 
 package io.github.imsejin.dl.lezhin.process.impl;
 
+import io.github.imsejin.common.assertion.Asserts;
 import io.github.imsejin.common.util.FileUtils;
 import io.github.imsejin.dl.lezhin.annotation.ProcessSpecification;
 import io.github.imsejin.dl.lezhin.api.auth.model.Authority;
@@ -29,6 +30,7 @@
 import io.github.imsejin.dl.lezhin.common.Loggers;
 import io.github.imsejin.dl.lezhin.common.PropertyBinder;
 import io.github.imsejin.dl.lezhin.exception.DirectoryCreationException;
+import io.github.imsejin.dl.lezhin.exception.ImageCountNotFoundException;
 import io.github.imsejin.dl.lezhin.http.url.URIs;
 import io.github.imsejin.dl.lezhin.process.ProcessContext;
 import io.github.imsejin.dl.lezhin.process.Processor;
@@ -66,6 +68,9 @@
 @ProcessSpecification(dependsOn = DirectoryCreationProcessor.class)
 public class DownloadProcessor implements Processor {
 
+    /**
+     * EpisodeImageCountService is only available on korean platform.
+     */
     private static final Map<Locale, ImageCountResolver> IMPLEMENTATION_MAP = Map.ofEntries(
             Map.entry(Locale.KOREA, new UsingService()),
             Map.entry(Locale.US, new VisitingPage()),
@@ -95,18 +100,7 @@ public Void process(ProcessContext context) throws DirectoryCreationException {
                 continue;
             }
 
-            int imageCount;
-            try {
-                imageCount = imageCountResolver.getImageCountOfEpisode(context, episode);
-            } catch (NullPointerException ignored) {
-                // TODO: Remove the below code if solve the issue (#153).
-                //       See https://github.com/ImSejin/lezhin-comics-downloader/issues/153
-                UsingService impl = (UsingService) imageCountResolver;
-                Loggers.getLogger().debug("Failed to get image count of episode[{}]: (UsingService.imageCountMap={})",
-                        episode, impl.imageCountMap);
-                imageCountResolver = IMPLEMENTATION_MAP.get(Locale.US);
-                imageCount = imageCountResolver.getImageCountOfEpisode(context, episode);
-            }
+            int imageCount = getImageCount(context, episode, imageCountResolver);
 
             // If episode has no image, skips this episode.
             if (imageCount < 1) {
@@ -132,7 +126,7 @@ public Void process(ProcessContext context) throws DirectoryCreationException {
                     String fileName = String.format("%03d.%s", n, context.getImageFormat().getValue());
                     Path dest = episodeDirectoryPath.resolve(fileName);
 
-                    // Tries to download a image of the specific resolution.
+                    // Tries to download an image of the specific resolution.
                     // The resolution depends on whether you paid for this episode or not.
                     URL url = getImageUrl(context, episode, authority, n, purchased);
                     boolean success = downloadImage(url, dest);
@@ -176,7 +170,16 @@ public void prepare(ProcessContext context) {
 
         @Override
         public int getImageCountOfEpisode(ProcessContext context, Episode episode) {
-            return this.imageCountMap.get(episode.getName());
+            Integer imageCount = this.imageCountMap.get(episode.getName());
+
+            // There is case that imageCountMap doesn't have all names of episode as key for a certain content.
+            // I guess that lezhin API doesn't provide metadata of new episode. - ImSejin
+            if (imageCount == null) {
+                throw new ImageCountNotFoundException("Failed to get image count of episode[{}]: imageCountMap={}",
+                        episode, this.imageCountMap);
+            }
+
+            return imageCount;
         }
     }
 
@@ -234,6 +237,30 @@ private static int[] calculateRange(EpisodeRange episodeRange, int episodeCount)
         }
     }
 
+    private static int getImageCount(ProcessContext context, Episode episode, ImageCountResolver resolver) {
+        int imageCount;
+
+        try {
+            imageCount = resolver.getImageCountOfEpisode(context, episode);
+        } catch (ImageCountNotFoundException e) {
+            Asserts.that(resolver)
+                    .isNotNull()
+                    .isInstanceOf(UsingService.class);
+
+            Loggers.getLogger().debug(e.getMessage());
+            resolver = IMPLEMENTATION_MAP.get(Locale.US);
+
+            Asserts.that(resolver)
+                    .isNotNull()
+                    .isInstanceOf(VisitingPage.class);
+
+            // Fix: https://github.com/ImSejin/lezhin-comics-downloader/issues/153
+            imageCount = resolver.getImageCountOfEpisode(context, episode);
+        }
+
+        return imageCount;
+    }
+
     private URL getImageUrl(ProcessContext context, Episode episode, Authority authority, int num, boolean purchased) {
         String uriString = URIs.EPISODE_IMAGE.get(context.getContent().getId(), episode.getId(), num,
                 context.getImageFormat().getValue(), purchased, authority.getPolicy(), authority.getSignature(),
@@ -251,13 +278,14 @@ private URL getImageUrl(ProcessContext context, Episode episode, Authority autho
     }
 
     /**
-     * Creates a image file with the image URL. Returns {@code true} if success or {@code false}.
+     * Creates an image file with the image URL. Returns {@code true} if success or {@code false}.
      */
     private static boolean downloadImage(URL url, Path dest) {
         try {
             FileUtils.download(url, dest);
             return true;
         } catch (Exception e) {
+            Loggers.getLogger().debug("Failed to download an image to {} by {}", dest, url);
             return false;
         }
     }