diff --git a/config/default.js b/config/default.js
index 1151353..4c4a8cf 100755
--- a/config/default.js
+++ b/config/default.js
@@ -40,6 +40,9 @@ module.exports = {
   CHALLENGE_API_V5_URL: process.env.CHALLENGE_API_V5_URL || 'http://localhost:3001/v5/challenges',
   RESOURCE_ROLE_API_URL: process.env.RESOURCE_ROLE_API_URL || 'http://localhost:3001/v5/resource-roles',
 
+  V4_ES_FEEDER_API_URL: process.env.V4_ES_FEEDER_API_URL || 'https://api.topcoder-dev.com/v4/esfeeder/challenges',
+  INDEX_CHALLENGE_TIMEOUT: process.env.INDEX_CHALLENGE_TIMEOUT || 2,
+
   AUTH0_URL: process.env.AUTH0_URL || 'https://topcoder-dev.auth0.com/oauth/token', // Auth0 credentials for M2M token
   AUTH0_AUDIENCE: process.env.AUTH0_AUDIENCE || 'https://m2m.topcoder-dev.com/',
   AUTH0_CLIENT_ID: process.env.AUTH0_CLIENT_ID || 'e6oZAxnoFvjdRtjJs1Jt3tquLnNSTs0e',
diff --git a/src/common/helper.js b/src/common/helper.js
index 8d4b69a..d4fe026 100644
--- a/src/common/helper.js
+++ b/src/common/helper.js
@@ -187,6 +187,16 @@ async function executeSQLonDB (sql, params) {
   }
 }
 
+async function forceV4ESFeeder (legacyId) {
+  const token = await getM2Mtoken()
+  const body = {
+    param: {
+      challengeIds: [legacyId]
+    }
+  }
+  await request.put(`${config.V4_ES_FEEDER_API_URL}`).send(body).set({ Authorization: `Bearer ${token}` })
+}
+
 module.exports = {
   getInformixConnection,
   getM2Mtoken,
@@ -197,5 +207,6 @@ module.exports = {
   prepare,
   ESFeederServiceClient,
   queryDataFromDB,
-  executeSQLonDB
+  executeSQLonDB,
+  forceV4ESFeeder
 }
diff --git a/src/services/ProcessorService.js b/src/services/ProcessorService.js
index d6fa186..91e1ea0 100755
--- a/src/services/ProcessorService.js
+++ b/src/services/ProcessorService.js
@@ -92,6 +92,11 @@ async function _updateChallengeResource (message, isDelete) {
   }
 
   if (resourceRole.id === config.SUBMITTER_ROLE_ID && !isTask) {
+    // force sync v4 elasticsearch service
+    logger.debug(`Start v4 challenge reindexing to the elasticsearch service`)
+    await helper.forceV4ESFeeder(_.get(v5Challenge, 'legacyId'));
+    await new Promise(resolve => setTimeout(resolve, config.INDEX_CHALLENGE_TIMEOUT * 1000));
+    logger.debug(`End v4 challenge reindexing to the elasticsearch service`)
     if (isDelete) {
       logger.debug(`v4 Unregistering Submitter ${config.CHALLENGE_API_V4_URL}/${_.get(v5Challenge, 'legacyId')}/unregister?userId=${userId} - ${JSON.stringify(body)}`)
       await helper.postRequest(`${config.CHALLENGE_API_V4_URL}/${_.get(v5Challenge, 'legacyId')}/unregister?userId=${userId}`, {}, m2mToken)