diff --git a/src/fru_device/fru_utils.cpp b/src/fru_device/fru_utils.cpp
index efb4ec1..1efcd30 100644
--- a/src/fru_device/fru_utils.cpp
+++ b/src/fru_device/fru_utils.cpp
@@ -277,7 +277,7 @@
 
 static void parseMultirecordUUID(
     std::span<const uint8_t> device,
-    boost::container::flat_map<std::string, std::string>& result)
+    std::flat_map<std::string, std::string, std::less<>>& result)
 {
     constexpr size_t uuidDataLen = 16;
     constexpr size_t multiRecordHeaderLen = 5;
@@ -364,7 +364,7 @@
     std::span<const uint8_t>::const_iterator& fruBytesIterEndArea,
     const std::vector<std::string>& fruAreaFieldNames, size_t& fieldIndex,
     DecodeState& state, bool isLangEng, const fruAreas& area,
-    boost::container::flat_map<std::string, std::string>& result)
+    std::flat_map<std::string, std::string, std::less<>>& result)
 {
     auto res = decodeFRUData(fruBytesIter, fruBytesIterEndArea, isLangEng);
     state = res.first;
@@ -432,7 +432,7 @@
 
 resCodes formatIPMIFRU(
     std::span<const uint8_t> fruBytes,
-    boost::container::flat_map<std::string, std::string>& result)
+    std::flat_map<std::string, std::string, std::less<>>& result)
 {
     resCodes ret = resCodes::resOK;
     if (fruBytes.size() <= fruBlockSize)
@@ -1594,9 +1594,9 @@
 // regular expression and find the device index for all devices.
 
 std::optional<int> findIndexForFRU(
-    boost::container::flat_map<
-        std::pair<size_t, size_t>,
-        std::shared_ptr<sdbusplus::asio::dbus_interface>>& dbusInterfaceMap,
+    std::flat_map<std::pair<size_t, size_t>,
+                  std::shared_ptr<sdbusplus::asio::dbus_interface>>&
+        dbusInterfaceMap,
     std::string& productName)
 {
     int highest = -1;
@@ -1640,7 +1640,7 @@
 
 std::optional<std::string> getProductName(
     std::vector<uint8_t>& device,
-    boost::container::flat_map<std::string, std::string>& formattedFRU,
+    std::flat_map<std::string, std::string, std::less<>>& formattedFRU,
     uint32_t bus, uint32_t address, size_t& unknownBusObjectCount)
 {
     std::string productName;