diff --git a/src/main/java/org/codelibs/fess/es/config/exentity/CrawlingConfig.java b/src/main/java/org/codelibs/fess/es/config/exentity/CrawlingConfig.java
index 7148d7af8..f84186370 100644
--- a/src/main/java/org/codelibs/fess/es/config/exentity/CrawlingConfig.java
+++ b/src/main/java/org/codelibs/fess/es/config/exentity/CrawlingConfig.java
@@ -45,6 +45,9 @@ public interface CrawlingConfig {
 
     Integer getTimeToLive();
 
+    @Deprecated
+    Map<String, Object> initializeClientFactory(CrawlerClientFactory crawlerClientFactory);
+
     CrawlerClientFactory initializeClientFactory(Supplier<CrawlerClientFactory> creator);
 
     Map<String, String> getConfigParameterMap(ConfigName name);
diff --git a/src/main/java/org/codelibs/fess/es/config/exentity/CrawlingConfigWrapper.java b/src/main/java/org/codelibs/fess/es/config/exentity/CrawlingConfigWrapper.java
index fae844f0a..1b67cd0ae 100644
--- a/src/main/java/org/codelibs/fess/es/config/exentity/CrawlingConfigWrapper.java
+++ b/src/main/java/org/codelibs/fess/es/config/exentity/CrawlingConfigWrapper.java
@@ -15,6 +15,7 @@
  */
 package org.codelibs.fess.es.config.exentity;
 
+import java.util.Collections;
 import java.util.Map;
 import java.util.function.Supplier;
 
@@ -77,4 +78,10 @@ public class CrawlingConfigWrapper implements CrawlingConfig {
     public Map<String, String> getConfigParameterMap(final ConfigName name) {
         return crawlingConfig.getConfigParameterMap(name);
     }
+
+    @Override
+    public Map<String, Object> initializeClientFactory(final CrawlerClientFactory crawlerClientFactory) {
+        initializeClientFactory(() -> crawlerClientFactory);
+        return Collections.emptyMap();
+    }
 }
diff --git a/src/main/java/org/codelibs/fess/es/config/exentity/DataConfig.java b/src/main/java/org/codelibs/fess/es/config/exentity/DataConfig.java
index e4ded8ac5..2b279dd09 100644
--- a/src/main/java/org/codelibs/fess/es/config/exentity/DataConfig.java
+++ b/src/main/java/org/codelibs/fess/es/config/exentity/DataConfig.java
@@ -414,4 +414,9 @@ public class DataConfig extends BsDataConfig implements CrawlingConfig {
                 + updatedBy + ", updatedTime=" + updatedTime + "]";
     }
 
+    @Override
+    public Map<String, Object> initializeClientFactory(final CrawlerClientFactory crawlerClientFactory) {
+        initializeClientFactory(() -> crawlerClientFactory);
+        return Collections.emptyMap();
+    }
 }
diff --git a/src/main/java/org/codelibs/fess/es/config/exentity/FileConfig.java b/src/main/java/org/codelibs/fess/es/config/exentity/FileConfig.java
index 5341a0204..d9a0e8b80 100644
--- a/src/main/java/org/codelibs/fess/es/config/exentity/FileConfig.java
+++ b/src/main/java/org/codelibs/fess/es/config/exentity/FileConfig.java
@@ -245,4 +245,9 @@ public class FileConfig extends BsFileConfig implements CrawlingConfig {
                 + sortOrder + ", updatedBy=" + updatedBy + ", updatedTime=" + updatedTime + "]";
     }
 
+    @Override
+    public Map<String, Object> initializeClientFactory(final CrawlerClientFactory crawlerClientFactory) {
+        initializeClientFactory(() -> crawlerClientFactory);
+        return Collections.emptyMap();
+    }
 }
diff --git a/src/main/java/org/codelibs/fess/es/config/exentity/WebConfig.java b/src/main/java/org/codelibs/fess/es/config/exentity/WebConfig.java
index 0aad56159..780025f80 100644
--- a/src/main/java/org/codelibs/fess/es/config/exentity/WebConfig.java
+++ b/src/main/java/org/codelibs/fess/es/config/exentity/WebConfig.java
@@ -251,4 +251,9 @@ public class WebConfig extends BsWebConfig implements CrawlingConfig {
                 + ", updatedBy=" + updatedBy + ", updatedTime=" + updatedTime + ", urls=" + urls + ", userAgent=" + userAgent + "]";
     }
 
+    @Override
+    public Map<String, Object> initializeClientFactory(final CrawlerClientFactory crawlerClientFactory) {
+        initializeClientFactory(() -> crawlerClientFactory);
+        return Collections.emptyMap();
+    }
 }