diff --git a/src/main/java/org/codelibs/fess/es/client/CrawlerEngineClient.java b/src/main/java/org/codelibs/fess/es/client/CrawlerEngineClient.java
index c0073f7b5..31c089818 100644
--- a/src/main/java/org/codelibs/fess/es/client/CrawlerEngineClient.java
+++ b/src/main/java/org/codelibs/fess/es/client/CrawlerEngineClient.java
@@ -33,7 +33,8 @@ public class CrawlerEngineClient extends FesenClient {
         final FessConfig fessConfig = ComponentUtil.getFessConfig();
         final String[] hosts =
                 split(address, ",").get(stream -> stream.map(s -> s.trim()).filter(StringUtil::isNotEmpty).toArray(n -> new String[n]));
-        final Builder builder = Settings.builder().putList("http.hosts", hosts).put("processors", fessConfig.getCrawlerHttpProcessors());
+        final Builder builder = Settings.builder().putList("http.hosts", hosts).put("processors", fessConfig.getCrawlerHttpProcessors())
+                .put("http.heartbeat_interval", fessConfig.getElasticsearchHeartbeatIntervalAsInteger().longValue());
         final String username = fessConfig.getElasticsearchUsername();
         final String password = fessConfig.getElasticsearchPassword();
         if (StringUtil.isNotBlank(username) && StringUtil.isNotBlank(password)) {
diff --git a/src/main/java/org/codelibs/fess/es/client/SearchEngineClient.java b/src/main/java/org/codelibs/fess/es/client/SearchEngineClient.java
index 28e734bcf..20c56d350 100644
--- a/src/main/java/org/codelibs/fess/es/client/SearchEngineClient.java
+++ b/src/main/java/org/codelibs/fess/es/client/SearchEngineClient.java
@@ -350,7 +350,8 @@ public class SearchEngineClient implements Client {
     protected Client createHttpClient(final FessConfig fessConfig, final String host) {
         final String[] hosts =
                 split(host, ",").get(stream -> stream.map(s -> s.trim()).filter(StringUtil::isNotEmpty).toArray(n -> new String[n]));
-        final Builder builder = Settings.builder().putList("http.hosts", hosts).put("processors", fessConfig.availableProcessors());
+        final Builder builder = Settings.builder().putList("http.hosts", hosts).put("processors", fessConfig.availableProcessors())
+                .put("http.heartbeat_interval", fessConfig.getElasticsearchHeartbeatIntervalAsInteger().longValue());
         final String username = fessConfig.getElasticsearchUsername();
         final String password = fessConfig.getElasticsearchPassword();
         if (StringUtil.isNotBlank(username) && StringUtil.isNotBlank(password)) {
diff --git a/src/main/java/org/codelibs/fess/helper/CurlHelper.java b/src/main/java/org/codelibs/fess/helper/CurlHelper.java
index 68c4bf5f6..8f336317d 100644
--- a/src/main/java/org/codelibs/fess/helper/CurlHelper.java
+++ b/src/main/java/org/codelibs/fess/helper/CurlHelper.java
@@ -76,6 +76,7 @@ public class CurlHelper {
         final String[] hosts = split(ResourceUtil.getFesenHttpUrl(), ",")
                 .get(stream -> stream.map(s -> s.trim()).filter(StringUtil::isNotEmpty).toArray(n -> new String[n]));
         nodeManager = new NodeManager(hosts, node -> get(node.getUrl("/")));
+        nodeManager.setHeartbeatInterval(fessConfig.getElasticsearchHeartbeatIntervalAsInteger().longValue());
     }
 
     public CurlRequest get(final String path) {
diff --git a/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java b/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
index b5165c0cd..ad9128673 100644
--- a/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
+++ b/src/main/java/org/codelibs/fess/mylasta/direction/FessConfig.java
@@ -40,6 +40,9 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
     /** The key of the configuration. e.g.  */
     String ELASTICSEARCH_PASSWORD = "elasticsearch.password";
 
+    /** The key of the configuration. e.g. 10000 */
+    String ELASTICSEARCH_heartbeat_interval = "elasticsearch.heartbeat_interval";
+
     /** The key of the configuration. e.g. aes */
     String APP_CIPHER_ALGORISM = "app.cipher.algorism";
 
@@ -1811,6 +1814,21 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
      */
     Integer getElasticsearchPasswordAsInteger();
 
+    /**
+     * Get the value for the key 'elasticsearch.heartbeat_interval'. <br>
+     * The value is, e.g. 10000 <br>
+     * @return The value of found property. (NotNull: if not found, exception but basically no way)
+     */
+    String getElasticsearchHeartbeatInterval();
+
+    /**
+     * Get the value for the key 'elasticsearch.heartbeat_interval' as {@link Integer}. <br>
+     * The value is, e.g. 10000 <br>
+     * @return The value of found property. (NotNull: if not found, exception but basically no way)
+     * @throws NumberFormatException When the property is not integer.
+     */
+    Integer getElasticsearchHeartbeatIntervalAsInteger();
+
     /**
      * Get the value for the key 'app.cipher.algorism'. <br>
      * The value is, e.g. aes <br>
@@ -7282,6 +7300,14 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
             return getAsInteger(FessConfig.ELASTICSEARCH_PASSWORD);
         }
 
+        public String getElasticsearchHeartbeatInterval() {
+            return get(FessConfig.ELASTICSEARCH_heartbeat_interval);
+        }
+
+        public Integer getElasticsearchHeartbeatIntervalAsInteger() {
+            return getAsInteger(FessConfig.ELASTICSEARCH_heartbeat_interval);
+        }
+
         public String getAppCipherAlgorism() {
             return get(FessConfig.APP_CIPHER_ALGORISM);
         }
@@ -10139,6 +10165,7 @@ public interface FessConfig extends FessEnv, org.codelibs.fess.mylasta.direction
             defaultMap.put(FessConfig.ELASTICSEARCH_HTTP_SSL_certificate_authorities, "");
             defaultMap.put(FessConfig.ELASTICSEARCH_USERNAME, "");
             defaultMap.put(FessConfig.ELASTICSEARCH_PASSWORD, "");
+            defaultMap.put(FessConfig.ELASTICSEARCH_heartbeat_interval, "10000");
             defaultMap.put(FessConfig.APP_CIPHER_ALGORISM, "aes");
             defaultMap.put(FessConfig.APP_CIPHER_KEY, "___change__me___");
             defaultMap.put(FessConfig.APP_DIGEST_ALGORISM, "sha256");
diff --git a/src/main/resources/fess_config.properties b/src/main/resources/fess_config.properties
index ecf803f9d..162f62c99 100644
--- a/src/main/resources/fess_config.properties
+++ b/src/main/resources/fess_config.properties
@@ -14,6 +14,7 @@ elasticsearch.http.url=http://localhost:9201
 elasticsearch.http.ssl.certificate_authorities=
 elasticsearch.username=
 elasticsearch.password=
+elasticsearch.heartbeat_interval=10000
 
 # Cryptographer
 app.cipher.algorism=aes