diff --git a/vnstock3/explorer/vci/company.py b/vnstock3/explorer/vci/company.py
index 1aa7ea71..8774aaa9 100644
--- a/vnstock3/explorer/vci/company.py
+++ b/vnstock3/explorer/vci/company.py
@@ -36,6 +36,13 @@ def _fetch_data(self):
         payload = "{\"query\":\"query Query($ticker: String!, $lang: String!) {\\n  AnalysisReportFiles(ticker: $ticker, langCode: $lang) {\\n    date\\n    description\\n    link\\n    name\\n    __typename\\n  }\\n  News(ticker: $ticker, langCode: $lang) {\\n    id\\n    organCode\\n    ticker\\n    newsTitle\\n    newsSubTitle\\n    friendlySubTitle\\n    newsImageUrl\\n    newsSourceLink\\n    createdAt\\n    publicDate\\n    updatedAt\\n    langCode\\n    newsId\\n    newsShortContent\\n    newsFullContent\\n    closePrice\\n    referencePrice\\n    floorPrice\\n    ceilingPrice\\n    percentPriceChange\\n    __typename\\n  }\\n  TickerPriceInfo(ticker: $ticker) {\\n    financialRatio {\\n      yearReport\\n      lengthReport\\n      updateDate\\n      revenue\\n      revenueGrowth\\n      netProfit\\n      netProfitGrowth\\n      ebitMargin\\n      roe\\n      roic\\n      roa\\n      pe\\n      pb\\n      eps\\n      currentRatio\\n      cashRatio\\n      quickRatio\\n      interestCoverage\\n      ae\\n      fae\\n      netProfitMargin\\n      grossMargin\\n      ev\\n      issueShare\\n      ps\\n      pcf\\n      bvps\\n      evPerEbitda\\n      at\\n      fat\\n      acp\\n      dso\\n      dpo\\n      epsTTM\\n      charterCapital\\n      RTQ4\\n      charterCapitalRatio\\n      RTQ10\\n      dividend\\n      ebitda\\n      ebit\\n      le\\n      de\\n      ccc\\n      RTQ17\\n      __typename\\n    }\\n    ticker\\n    exchange\\n    ev\\n    ceilingPrice\\n    floorPrice\\n    referencePrice\\n    openPrice\\n    matchPrice\\n    closePrice\\n    priceChange\\n    percentPriceChange\\n    highestPrice\\n    lowestPrice\\n    totalVolume\\n    highestPrice1Year\\n    lowestPrice1Year\\n    percentLowestPriceChange1Year\\n    percentHighestPriceChange1Year\\n    foreignTotalVolume\\n    foreignTotalRoom\\n    averageMatchVolume2Week\\n    foreignHoldingRoom\\n    currentHoldingRatio\\n    maxHoldingRatio\\n    __typename\\n  }\\n  Subsidiary(ticker: $ticker) {\\n    id\\n    organCode\\n    subOrganCode\\n    percentage\\n    subOrListingInfo {\\n      enOrganName\\n      organName\\n      __typename\\n    }\\n    __typename\\n  }\\n  Affiliate(ticker: $ticker) {\\n    id\\n    organCode\\n    subOrganCode\\n    percentage\\n    subOrListingInfo {\\n      enOrganName\\n      organName\\n      __typename\\n    }\\n    __typename\\n  }\\n  CompanyListingInfo(ticker: $ticker) {\\n    id\\n    issueShare\\n    en_History\\n    history\\n    en_CompanyProfile\\n    companyProfile\\n    icbName3\\n    enIcbName3\\n    icbName2\\n    enIcbName2\\n    icbName4\\n    enIcbName4\\n    financialRatio {\\n      id\\n      ticker\\n      issueShare\\n      charterCapital\\n      __typename\\n    }\\n    __typename\\n  }\\n  OrganizationManagers(ticker: $ticker) {\\n    id\\n    ticker\\n    fullName\\n    positionName\\n    positionShortName\\n    en_PositionName\\n    en_PositionShortName\\n    updateDate\\n    percentage\\n    quantity\\n    __typename\\n  }\\n  OrganizationShareHolders(ticker: $ticker) {\\n    id\\n    ticker\\n    ownerFullName\\n    en_OwnerFullName\\n    quantity\\n    percentage\\n    updateDate\\n    __typename\\n  }\\n  OrganizationResignedManagers(ticker: $ticker) {\\n    id\\n    ticker\\n    fullName\\n    positionName\\n    positionShortName\\n    en_PositionName\\n    en_PositionShortName\\n    updateDate\\n    percentage\\n    quantity\\n    __typename\\n  }\\n  OrganizationEvents(ticker: $ticker) {\\n    id\\n    organCode\\n    ticker\\n    eventTitle\\n    en_EventTitle\\n    publicDate\\n    issueDate\\n    sourceUrl\\n    eventListCode\\n    ratio\\n    value\\n    recordDate\\n    exrightDate\\n    eventListName\\n    en_EventListName\\n    __typename\\n  }\\n}\\n\",\"variables\":{\"ticker\":\"VCI\",\"lang\":\"vi\"}}"
         if self.show_log:
             logger.debug(f"Requesting data for {self.symbol} from {url}. payload: {payload}")
+
+        # load payload to dict
+        payload = json.loads(payload)
+        payload['variables']['ticker'] = self.symbol
+        # convert dict to json string
+        payload = json.dumps(payload)
+
         response = requests.request("POST", url, headers=self.headers, data=payload)
         if self.show_log:
             logger.debug(f"Response: {response.text}")