diff --git a/extensions/phal/clock_logger.hpp b/extensions/phal/clock_logger.hpp
index d52293a..1c344b8 100644
--- a/extensions/phal/clock_logger.hpp
+++ b/extensions/phal/clock_logger.hpp
@@ -17,8 +17,6 @@
 
 #include "extensions/phal/create_pel.hpp"
 
-#include <fmt/format.h>
-
 #include <sdeventplus/utility/timer.hpp>
 
 #include <chrono>
diff --git a/extensions/phal/clock_logger_main.cpp b/extensions/phal/clock_logger_main.cpp
index 7d85764..6d3aed0 100644
--- a/extensions/phal/clock_logger_main.cpp
+++ b/extensions/phal/clock_logger_main.cpp
@@ -16,8 +16,6 @@
 
 #include "extensions/phal/clock_logger.hpp"
 
-#include <fmt/format.h>
-
 #include <phosphor-logging/lg2.hpp>
 #include <sdbusplus/bus.hpp>
 #include <sdeventplus/source/event.hpp>
diff --git a/extensions/phal/common_utils.cpp b/extensions/phal/common_utils.cpp
index fb90e88..47717b9 100644
--- a/extensions/phal/common_utils.cpp
+++ b/extensions/phal/common_utils.cpp
@@ -5,7 +5,6 @@
 #include "extensions/phal/pdbg_utils.hpp"
 #include "extensions/phal/phal_error.hpp"
 
-#include <fmt/format.h>
 #include <libekb.H>
 
 #include <phosphor-logging/log.hpp>
diff --git a/extensions/phal/create_pel.cpp b/extensions/phal/create_pel.cpp
index 95ee7ae..d3810ef 100644
--- a/extensions/phal/create_pel.cpp
+++ b/extensions/phal/create_pel.cpp
@@ -5,7 +5,6 @@
 #include "util.hpp"
 
 #include <fcntl.h>
-#include <fmt/format.h>
 #include <libekb.H>
 #include <libphal.H>
 #include <unistd.h>
@@ -18,6 +17,7 @@
 #include <cstdio>
 #include <cstdlib>
 #include <cstring>
+#include <format>
 #include <map>
 #include <stdexcept>
 #include <string>
@@ -72,7 +72,7 @@
     }
     catch (const std::exception& e)
     {
-        log<level::ERR>(fmt::format("getLocationCode({}): Exception({})",
+        log<level::ERR>(std::format("getLocationCode({}): Exception({})",
                                     pdbg_target_path(procTarget), e.what())
                             .c_str());
     }
@@ -118,7 +118,7 @@
     catch (const sdbusplus::exception_t& e)
     {
         log<level::ERR>(
-            fmt::format("D-Bus call exception",
+            std::format("D-Bus call exception",
                         "OBJPATH={}, INTERFACE={}, event={}, EXCEPTION={}",
                         loggingObjectPath, loggingInterface, event, e.what())
                 .c_str());
@@ -197,7 +197,7 @@
     catch (const std::exception& e)
     {
         log<level::ERR>(
-            fmt::format("Skipping SBE special callout due to Exception({})",
+            std::format("Skipping SBE special callout due to Exception({})",
                         e.what())
                 .c_str());
     }
@@ -224,7 +224,7 @@
     }
     catch (const sdbusplus::exception_t& e)
     {
-        log<level::ERR>(fmt::format("D-Bus call exception",
+        log<level::ERR>(std::format("D-Bus call exception",
                                     "OBJPATH={}, INTERFACE={}, EXCEPTION={}",
                                     loggingObjectPath, loggingInterface,
                                     e.what())
@@ -265,7 +265,7 @@
     }
     catch (const sdbusplus::exception_t& e)
     {
-        log<level::ERR>(fmt::format("sdbusplus D-Bus call exception",
+        log<level::ERR>(std::format("sdbusplus D-Bus call exception",
                                     "OBJPATH={}, INTERFACE={}, EXCEPTION={}",
                                     loggingObjectPath, loggingInterface,
                                     e.what())
@@ -278,7 +278,7 @@
     catch (const std::exception& e)
     {
         log<level::ERR>(
-            fmt::format("D-bus call exception", "EXCEPTION={}", e.what())
+            std::format("D-bus call exception", "EXCEPTION={}", e.what())
                 .c_str());
         throw e;
     }
@@ -314,7 +314,7 @@
 
     if (fileFD == -1)
     {
-        log<level::ERR>(fmt::format("Failed to create phalPELCallouts "
+        log<level::ERR>(std::format("Failed to create phalPELCallouts "
                                     "file({}), errorno({}) and errormsg({})",
                                     calloutFile, errno, strerror(errno))
                             .c_str());
@@ -328,7 +328,7 @@
 
     if (rc == -1)
     {
-        log<level::ERR>(fmt::format("Failed to write phaPELCallout info "
+        log<level::ERR>(std::format("Failed to write phaPELCallout info "
                                     "in file({}), errorno({}), errormsg({})",
                                     calloutFile, errno, strerror(errno))
                             .c_str());
@@ -336,7 +336,7 @@
     }
     else if (rc != static_cast<ssize_t>(calloutData.size()))
     {
-        log<level::WARNING>(fmt::format("Could not write all phal callout "
+        log<level::WARNING>(std::format("Could not write all phal callout "
                                         "info in file({}), written byte({}) "
                                         "and total byte({})",
                                         calloutFile, rc, calloutData.size())
@@ -350,7 +350,7 @@
 
     if (rc == -1)
     {
-        log<level::ERR>(fmt::format("Failed to set SEEK_SET for "
+        log<level::ERR>(std::format("Failed to set SEEK_SET for "
                                     "phalPELCallouts in file({}), errorno({}) "
                                     "and errormsg({})",
                                     calloutFile, errno, strerror(errno))
diff --git a/extensions/phal/devtree_export.cpp b/extensions/phal/devtree_export.cpp
index ad21332..afa6e6a 100644
--- a/extensions/phal/devtree_export.cpp
+++ b/extensions/phal/devtree_export.cpp
@@ -1,10 +1,10 @@
 #include "fw_update_watch.hpp"
 
-#include <fmt/format.h>
-
 #include <phosphor-logging/elog-errors.hpp>
 #include <sdeventplus/event.hpp>
 
+#include <format>
+
 int main()
 {
     auto eventRet = 0;
@@ -27,7 +27,7 @@
     {
         using namespace phosphor::logging;
         log<level::ERR>(
-            fmt::format("Exception reported: [{}]", e.what()).c_str());
+            std::format("Exception reported: [{}]", e.what()).c_str());
     }
 
     return eventRet;
diff --git a/extensions/phal/dump_utils.cpp b/extensions/phal/dump_utils.cpp
index 61bdd92..59f7f67 100644
--- a/extensions/phal/dump_utils.cpp
+++ b/extensions/phal/dump_utils.cpp
@@ -2,13 +2,13 @@
 
 #include "util.hpp"
 
-#include <fmt/format.h>
-
 #include <phosphor-logging/log.hpp>
 #include <sdbusplus/bus.hpp>
 #include <sdbusplus/exception.hpp>
 #include <sdbusplus/server.hpp>
 
+#include <format>
+
 namespace openpower::phal::dump
 {
 
@@ -43,7 +43,7 @@
                                     "OperationStatus.InProgress" != *status))
         {
             // dump is done, trace some info and change in progress flag
-            log<level::INFO>(fmt::format("Dump status({}) : path={}",
+            log<level::INFO>(std::format("Dump status({}) : path={}",
                                          status->c_str(), path.c_str())
                                  .c_str());
             inProgress = false;
@@ -100,7 +100,7 @@
 
 void requestDump(const DumpParameters& dumpParameters)
 {
-    log<level::INFO>(fmt::format("Requesting Dump PEL({}) Index({})",
+    log<level::INFO>(std::format("Requesting Dump PEL({}) Index({})",
                                  dumpParameters.logId, dumpParameters.unitId)
                          .c_str());
 
@@ -142,7 +142,7 @@
     }
     catch (const sdbusplus::exception_t& e)
     {
-        log<level::ERR>(fmt::format("D-Bus call createDump exception",
+        log<level::ERR>(std::format("D-Bus call createDump exception",
                                     "OBJPATH={}, INTERFACE={}, EXCEPTION={}",
                                     path, interface, e.what())
                             .c_str());
@@ -152,7 +152,7 @@
         {
             // Dump is disabled, Skip the dump collection.
             log<level::INFO>(
-                fmt::format("Dump is disabled on({}), skipping dump collection",
+                std::format("Dump is disabled on({}), skipping dump collection",
                             dumpParameters.unitId)
                     .c_str());
         }
diff --git a/extensions/phal/fw_update_watch.cpp b/extensions/phal/fw_update_watch.cpp
index b85c2f0..200d908 100644
--- a/extensions/phal/fw_update_watch.cpp
+++ b/extensions/phal/fw_update_watch.cpp
@@ -6,7 +6,6 @@
 #include "create_pel.hpp"
 #include "pdbg_utils.hpp"
 
-#include <fmt/format.h>
 #include <sys/stat.h>
 #include <sys/wait.h>
 #include <unistd.h>
@@ -16,6 +15,7 @@
 #include <sdbusplus/exception.hpp>
 
 #include <filesystem>
+#include <format>
 
 namespace openpower
 {
@@ -45,7 +45,7 @@
     }
     catch (const sdbusplus::exception_t& e)
     {
-        log<level::ERR>(fmt::format("Failed to parse software add signal"
+        log<level::ERR>(std::format("Failed to parse software add signal"
                                     "Exception [{}] REPLY_SIG [{}]",
                                     e.what(), msg.get_signature())
                             .c_str());
@@ -94,7 +94,7 @@
         catch (const fs::filesystem_error& e)
         {
             log<level::ERR>(
-                fmt::format("Filesystem error reported Error:({})", e.what())
+                std::format("Filesystem error reported Error:({})", e.what())
                     .c_str());
             throw std::runtime_error(e.what());
         }
@@ -115,7 +115,7 @@
     if (!fs::exists(path))
     {
         log<level::ERR>(
-            fmt::format("devtree export filter file is not available: ({})",
+            std::format("devtree export filter file is not available: ({})",
                         DEVTREE_EXPORT_FILTER_FILE)
                 .c_str());
         openpower::pel::createPEL(ERROR_DEVTREE_BACKUP);
@@ -152,7 +152,7 @@
         execl("/bin/sh", "sh", "-c", cmd.c_str(), 0);
 
         auto error = errno;
-        log<level::ERR>(fmt::format("Error occurred during attributes function "
+        log<level::ERR>(std::format("Error occurred during attributes function "
                                     "execution, errno({})",
                                     error)
                             .c_str());
diff --git a/extensions/phal/pdbg_utils.cpp b/extensions/phal/pdbg_utils.cpp
index db62522..a6a334f 100644
--- a/extensions/phal/pdbg_utils.cpp
+++ b/extensions/phal/pdbg_utils.cpp
@@ -8,10 +8,10 @@
 #include "extensions/phal/pdbg_utils.hpp"
 #include "extensions/phal/phal_error.hpp"
 
-#include <fmt/format.h>
-
 #include <phosphor-logging/log.hpp>
 
+#include <format>
+
 namespace openpower
 {
 namespace phal
@@ -128,7 +128,7 @@
     if (setenv("PDBG_DTB", CEC_DEVTREE_RW_PATH, 1))
     {
         log<level::ERR>(
-            fmt::format("Failed to set PDBG_DTB: ({})", strerror(errno))
+            std::format("Failed to set PDBG_DTB: ({})", strerror(errno))
                 .c_str());
         throw std::runtime_error("Failed to set PDBG_DTB");
     }
@@ -143,7 +143,7 @@
     if (setenv("PDATA_INFODB", PDATA_INFODB_PATH, 1))
     {
         log<level::ERR>(
-            fmt::format("Failed to set PDATA_INFODB: ({})", strerror(errno))
+            std::format("Failed to set PDATA_INFODB: ({})", strerror(errno))
                 .c_str());
         throw std::runtime_error("Failed to set PDATA_INFODB");
     }
diff --git a/extensions/phal/phal_error.cpp b/extensions/phal/phal_error.cpp
index 4cbf5af..96ba115 100644
--- a/extensions/phal/phal_error.cpp
+++ b/extensions/phal/phal_error.cpp
@@ -10,7 +10,6 @@
 #include "util.hpp"
 
 #include <attributes_info.H>
-#include <fmt/format.h>
 #include <libekb.H>
 #include <libphal.H>
 
@@ -20,6 +19,7 @@
 #include <algorithm>
 #include <cstdlib>
 #include <cstring>
+#include <format>
 #include <iomanip>
 #include <list>
 #include <map>
@@ -121,7 +121,7 @@
     }
     catch (const std::exception& e)
     {
-        log<level::ERR>(fmt::format("getLocationCode({}): Exception({})",
+        log<level::ERR>(std::format("getLocationCode({}): Exception({})",
                                     pdbg_target_path(target), e.what())
                             .c_str());
     }
@@ -129,14 +129,14 @@
     if (DT_GET_PROP(ATTR_PHYS_DEV_PATH, target, targetInfo->physDevPath))
     {
         log<level::ERR>(
-            fmt::format("Could not read({}) PHYS_DEV_PATH attribute",
+            std::format("Could not read({}) PHYS_DEV_PATH attribute",
                         pdbg_target_path(target))
                 .c_str());
     }
 
     if (DT_GET_PROP(ATTR_MRU_ID, target, targetInfo->mruId))
     {
-        log<level::ERR>(fmt::format("Could not read({}) ATTR_MRU_ID attribute",
+        log<level::ERR>(std::format("Could not read({}) ATTR_MRU_ID attribute",
                                     pdbg_target_path(target))
                             .c_str());
     }
@@ -168,9 +168,15 @@
                                    &targetInfo);
     if (ret == 0)
     {
-        log<level::ERR>(fmt::format("Given ATTR_PHYS_BIN_PATH value({:02x}) "
+        std::string fmt;
+        for (auto value : targetInfo.physBinPath)
+        {
+            fmt += std::format("{:02X} ", value);
+        }
+
+        log<level::ERR>(std::format("Given ATTR_PHYS_BIN_PATH value {} "
                                     "not found in phal device tree",
-                                    fmt::join(targetInfo.physBinPath, ""))
+                                    fmt)
                             .c_str());
         return false;
     }
@@ -253,7 +259,7 @@
     auto it = priorityMap.find(phalPriority);
     if (it == priorityMap.end())
     {
-        log<level::ERR>(fmt::format("Unsupported phal priority({}) is given "
+        log<level::ERR>(std::format("Unsupported phal priority({}) is given "
                                     "to get pel priority format",
                                     phalPriority)
                             .c_str());
@@ -309,7 +315,7 @@
         }
         catch (const std::exception& e)
         {
-            log<level::ERR>(fmt::format("getLocationCode({}): Exception({})",
+            log<level::ERR>(std::format("getLocationCode({}): Exception({})",
                                         pdbg_target_path(procTarget), e.what())
                                 .c_str());
         }
@@ -341,7 +347,7 @@
     try
     {
         log<level::INFO>(
-            fmt::format("processClockInfoErrorHelper: FFDC Message[{}]",
+            std::format("processClockInfoErrorHelper: FFDC Message[{}]",
                         ffdc->message)
                 .c_str());
 
@@ -418,7 +424,7 @@
 void processIplErrorCallback(const ipl_error_info& errInfo)
 {
     log<level::INFO>(
-        fmt::format("processIplErrorCallback: Error type({})",
+        std::format("processIplErrorCallback: Error type({})",
                     static_cast<std::underlying_type<ipl_error_type>::type>(
                         errInfo.type))
             .c_str());
@@ -499,7 +505,7 @@
     try
     {
         log<level::INFO>(
-            fmt::format("processPoweroffError: Message[{}]", ffdc->message)
+            std::format("processPoweroffError: Message[{}]", ffdc->message)
                 .c_str());
 
         // To store phal trace and other additional data about ffdc.
@@ -519,7 +525,7 @@
                  (ffdc->ffdc_type != FFDC_TYPE_UNSUPPORTED))
         {
             log<level::ERR>(
-                fmt::format("Unsupported phal FFDC type to create PEL. "
+                std::format("Unsupported phal FFDC type to create PEL. "
                             "MSG: {}",
                             ffdc->message)
                     .c_str());
@@ -550,7 +556,7 @@
     try
     {
         log<level::INFO>(
-            fmt::format("PHAL FFDC: Return Message[{}]", ffdc->message)
+            std::format("PHAL FFDC: Return Message[{}]", ffdc->message)
                 .c_str());
 
         // Special handling for spare clock related errors.
@@ -747,7 +753,7 @@
                  (ffdc->ffdc_type != FFDC_TYPE_UNSUPPORTED))
         {
             log<level::ERR>(
-                fmt::format("Unsupported phal FFDC type to create PEL. "
+                std::format("Unsupported phal FFDC type to create PEL. "
                             "MSG: {}",
                             ffdc->message)
                     .c_str());
@@ -816,7 +822,7 @@
     catch (const std::exception& ex)
     {
         log<level::ERR>(
-            fmt::format("processPlatBootError: exception({})", ex.what())
+            std::format("processPlatBootError: exception({})", ex.what())
                 .c_str());
         throw ex;
     }
@@ -825,7 +831,7 @@
 void processBootError(bool status)
 {
     log<level::INFO>(
-        fmt::format("processBootError: status({})", status).c_str());
+        std::format("processBootError: status({})", status).c_str());
 
     try
     {
@@ -848,7 +854,7 @@
     catch (const std::exception& ex)
     {
         log<level::ERR>(
-            fmt::format("processBootError: exception({})", ex.what()).c_str());
+            std::format("processBootError: exception({})", ex.what()).c_str());
         throw ex;
     }
 }
@@ -909,7 +915,7 @@
     {
         // Fail to collect FFDC information , trigger Dump
         log<level::ERR>(
-            fmt::format("captureFFDC: Exception({})", phalError.what())
+            std::format("captureFFDC: Exception({})", phalError.what())
                 .c_str());
         dumpIsRequired = true;
     }
diff --git a/procedures/p9/enter_mpreboot.cpp b/procedures/p9/enter_mpreboot.cpp
index 301bf7d..048f101 100644
--- a/procedures/p9/enter_mpreboot.cpp
+++ b/procedures/p9/enter_mpreboot.cpp
@@ -22,12 +22,12 @@
 #include <libpdbg_sbe.h>
 }
 
-#include <fmt/format.h>
 #include <sys/wait.h>
 #include <unistd.h>
 
 #include <phosphor-logging/log.hpp>
 
+#include <format>
 #include <system_error>
 #include <vector>
 
@@ -53,7 +53,7 @@
     }
 
     log<level::INFO>(
-        fmt::format("Enter MPIPL completed on proc({})", pdbg_target_index(tgt))
+        std::format("Enter MPIPL completed on proc({})", pdbg_target_index(tgt))
             .c_str());
 }
 
diff --git a/procedures/p9/thread_stopall.cpp b/procedures/p9/thread_stopall.cpp
index 8d5f755..6503fa4 100644
--- a/procedures/p9/thread_stopall.cpp
+++ b/procedures/p9/thread_stopall.cpp
@@ -1,6 +1,5 @@
 #include "registration.hpp"
 
-#include <fmt/format.h>
 extern "C"
 {
 #include <libpdbg.h>
diff --git a/procedures/phal/enter_mpreboot.cpp b/procedures/phal/enter_mpreboot.cpp
index 0db9889..1200399 100644
--- a/procedures/phal/enter_mpreboot.cpp
+++ b/procedures/phal/enter_mpreboot.cpp
@@ -26,7 +26,6 @@
 #include "extensions/phal/dump_utils.hpp"
 
 #include <attributes_info.H>
-#include <fmt/format.h>
 #include <libphal.H>
 #include <phal_exception.H>
 #include <sys/wait.h>
@@ -34,6 +33,7 @@
 
 #include <phosphor-logging/log.hpp>
 
+#include <format>
 #include <system_error>
 #include <vector>
 
@@ -65,13 +65,13 @@
             // SBE is not ready to accept chip-ops,
             // Skip the request, no additional error handling required.
             log<level::INFO>(
-                fmt::format("EnterMPIPL: Skipping ({}) on proc({})",
+                std::format("EnterMPIPL: Skipping ({}) on proc({})",
                             sbeError.what(), pdbg_target_index(tgt))
                     .c_str());
             return;
         }
 
-        log<level::ERR>(fmt::format("EnterMPIPL failed({}) on proc({})",
+        log<level::ERR>(std::format("EnterMPIPL failed({}) on proc({})",
                                     sbeError.what(), pdbg_target_index(tgt))
                             .c_str());
 
@@ -117,7 +117,7 @@
     catch (const phalError_t& phalError)
     {
         // Failure reported
-        log<level::ERR>(fmt::format("captureFFDC: Exception({}) on proc({})",
+        log<level::ERR>(std::format("captureFFDC: Exception({}) on proc({})",
                                     phalError.what(), pdbg_target_index(tgt))
                             .c_str());
         openpower::pel::createPEL(
@@ -126,7 +126,7 @@
     }
 
     log<level::INFO>(
-        fmt::format("Enter MPIPL completed on proc({})", pdbg_target_index(tgt))
+        std::format("Enter MPIPL completed on proc({})", pdbg_target_index(tgt))
             .c_str());
 }
 
diff --git a/procedures/phal/import_devtree.cpp b/procedures/phal/import_devtree.cpp
index d1cff3e..78d45c2 100644
--- a/procedures/phal/import_devtree.cpp
+++ b/procedures/phal/import_devtree.cpp
@@ -4,7 +4,6 @@
 #include "extensions/phal/pdbg_utils.hpp"
 #include "registration.hpp"
 
-#include <fmt/format.h>
 #include <sys/wait.h>
 #include <unistd.h>
 
@@ -14,6 +13,7 @@
 #include <xyz/openbmc_project/Common/error.hpp>
 
 #include <filesystem>
+#include <format>
 
 namespace openpower
 {
@@ -52,7 +52,7 @@
         execl("/bin/sh", "sh", "-c", cmd.c_str(), 0);
 
         auto error = errno;
-        log<level::ERR>(fmt::format("Error occurred during attributes import "
+        log<level::ERR>(std::format("Error occurred during attributes import "
                                     "execution, errno({})",
                                     error)
                             .c_str());
@@ -84,7 +84,7 @@
     }
     catch (const fs::filesystem_error& e)
     { // Log message and continue. Data already applied successfully.
-        log<level::ERR>(fmt::format("File({}) delete failed Error:({})",
+        log<level::ERR>(std::format("File({}) delete failed Error:({})",
                                     DEVTREE_EXP_FILE, e.what())
                             .c_str());
     }
diff --git a/procedures/phal/reinit_devtree.cpp b/procedures/phal/reinit_devtree.cpp
index 29b85c0..1e9918f 100644
--- a/procedures/phal/reinit_devtree.cpp
+++ b/procedures/phal/reinit_devtree.cpp
@@ -5,13 +5,13 @@
 #include "temporary_file.hpp"
 
 #include <fcntl.h>
-#include <fmt/format.h>
 
 #include <nlohmann/json.hpp>
 #include <phosphor-logging/elog-errors.hpp>
 
 #include <cstdio>
 #include <filesystem>
+#include <format>
 
 extern "C"
 {
@@ -44,7 +44,7 @@
     if (ret)
     {
         log<level::ERR>(
-            fmt::format("Failed({}) to update attribute override data", ret)
+            std::format("Failed({}) to update attribute override data", ret)
                 .c_str());
         throw std::runtime_error(
             "applyAttrOverride: dtree_cronus_import failed");
@@ -67,7 +67,7 @@
     if (rwFileName.empty())
     {
         std::string err =
-            fmt::format("Failed to read the target file "
+            std::format("Failed to read the target file "
                         "for the RW device tree symbolic link ({})",
                         CEC_DEVTREE_RW_PATH);
         log<level::ERR>(err.c_str());
@@ -76,7 +76,7 @@
     fs::path roFilePath = CEC_DEVTREE_RO_BASE_PATH / rwFileName;
     if (!fs::exists(roFilePath))
     {
-        auto err = fmt::format("RO device tree file ({}) does not "
+        auto err = std::format("RO device tree file ({}) does not "
                                "exit ",
                                roFilePath.string());
         log<level::ERR>(err.c_str());
@@ -130,7 +130,7 @@
         if (!fs::exists(attrFile))
         {
             log<level::ERR>(
-                fmt::format(
+                std::format(
                     "devtree attribute export list file is not available: ({})",
                     DEVTREE_REINIT_ATTRS_LIST)
                     .c_str());
@@ -147,7 +147,7 @@
             if (fpExport.get() == nullptr)
             {
                 log<level::ERR>(
-                    fmt::format("Temporary data file failed to open: ({})",
+                    std::format("Temporary data file failed to open: ({})",
                                 tmpFile.getPath().c_str())
                         .c_str());
                 throw std::runtime_error(
@@ -161,7 +161,7 @@
             if (ret)
             {
                 log<level::ERR>(
-                    fmt::format("Failed({}) to collect attribute export data",
+                    std::format("Failed({}) to collect attribute export data",
                                 ret)
                         .c_str());
                 throw std::runtime_error(
@@ -178,7 +178,7 @@
         if (fpImport.get() == nullptr)
         {
             log<level::ERR>(
-                fmt::format("import, temporary data file failed to open: ({})",
+                std::format("import, temporary data file failed to open: ({})",
                             tmpFile.getPath().c_str())
                     .c_str());
             throw std::runtime_error(
@@ -191,7 +191,7 @@
         if (ret)
         {
             log<level::ERR>(
-                fmt::format("Failed({}) to update attribute data", ret)
+                std::format("Failed({}) to update attribute data", ret)
                     .c_str());
             throw std::runtime_error(
                 "reinitDevtree: dtree_cronus_import function failed");
@@ -207,7 +207,7 @@
         // Any failures during temporary file re-init should create PEL
         // and continue with current version of devtree file to allow boot.
         log<level::ERR>(
-            fmt::format("reinitDevtree failed ({})", e.what()).c_str());
+            std::format("reinitDevtree failed ({})", e.what()).c_str());
         json jsonCalloutDataList;
         jsonCalloutDataList = json::array();
         json jsonCalloutData;
@@ -245,7 +245,7 @@
         // PEL, with code callout. Also failed the service.
         // and continue with current version of devtree file to allow boot.
         log<level::ERR>(
-            fmt::format("reinitDevtree r/w version update failed ({})",
+            std::format("reinitDevtree r/w version update failed ({})",
                         e.what())
                 .c_str());
         json jsonCalloutDataList;
diff --git a/procedures/phal/start_host.cpp b/procedures/phal/start_host.cpp
index c0c0fd6..e6f01ec 100644
--- a/procedures/phal/start_host.cpp
+++ b/procedures/phal/start_host.cpp
@@ -10,7 +10,6 @@
 #include "extensions/phal/phal_error.hpp"
 #include "util.hpp"
 
-#include <fmt/format.h>
 #include <libekb.H>
 
 #include <ext_interface.hpp>
@@ -18,6 +17,8 @@
 #include <phosphor-logging/log.hpp>
 #include <registration.hpp>
 
+#include <format>
+
 namespace openpower
 {
 namespace phal
@@ -131,13 +132,13 @@
     if (hwKwdSize != hwData.size())
     {
         log<level::ERR>(
-            fmt::format("Incorrect VINI records HW Keyword data size({})",
+            std::format("Incorrect VINI records HW Keyword data size({})",
                         hwData.size())
                 .c_str());
         throw std::runtime_error("Incorrect VINI records HW Keyword data size");
     }
 
-    log<level::DEBUG>(fmt::format("VINI Records HW[0]:{} HW[1]:{}",
+    log<level::DEBUG>(std::format("VINI Records HW[0]:{} HW[1]:{}",
                                   hwData.at(0), hwData.at(1))
                           .c_str());
 
@@ -206,7 +207,7 @@
         // Don't throw exception since the caller might call in the error path
         // and even we should allow the hardware isolation by default.
         log<level::ERR>(
-            fmt::format("Exception [{}], failed to create the error log "
+            std::format("Exception [{}], failed to create the error log "
                         "for the hardware isolation policy settings failures.",
                         e.what())
                 .c_str());
@@ -252,7 +253,7 @@
         }
         else
         {
-            const auto trace{fmt::format(
+            const auto trace{std::format(
                 "Failed to read the HardwareIsolation policy "
                 "from the path [{}] interface [{}]. Continuing with "
                 "default mode(allow_hw_isolation)",
@@ -265,7 +266,7 @@
     }
     catch (const sdbusplus::exception_t& e)
     {
-        const auto trace{fmt::format(
+        const auto trace{std::format(
             "Exception [{}] to get the HardwareIsolation policy "
             "from the path [{}] interface [{}]. Continuing with "
             "default mode (allow_hw_isolation)",
diff --git a/procedures/phal/thread_stopall.cpp b/procedures/phal/thread_stopall.cpp
index 0355eb2..b29bb30 100644
--- a/procedures/phal/thread_stopall.cpp
+++ b/procedures/phal/thread_stopall.cpp
@@ -3,10 +3,11 @@
 #include "registration.hpp"
 
 #include <attributes_info.H>
-#include <fmt/format.h>
 #include <libipl.H>
 #include <libphal.H>
 #include <phal_exception.H>
+
+#include <format>
 extern "C"
 {
 #include <libpdbg.h>
@@ -55,7 +56,7 @@
             if (DT_GET_PROP(ATTR_HWAS_STATE, procTarget, hwasState))
             {
                 log<level::ERR>(
-                    fmt::format("({})Could not read HWAS_STATE attribute",
+                    std::format("({})Could not read HWAS_STATE attribute",
                                 pdbg_target_path(procTarget))
                         .c_str());
                 continue;
@@ -77,7 +78,7 @@
                 if (errType == SBE_CMD_FAILED)
                 {
                     log<level::ERR>(
-                        fmt::format(
+                        std::format(
                             "threadStopAll failed({}) on proc({})",
                             static_cast<
                                 std::underlying_type<ipl_error_type>::type>(
@@ -105,7 +106,7 @@
                     // SBE is not ready to accept chip-ops,
                     // Skip the request, no additional error handling required.
                     log<level::INFO>(
-                        fmt::format("threadStopAll: Skipping ({}) on proc({})",
+                        std::format("threadStopAll: Skipping ({}) on proc({})",
                                     sbeError.what(),
                                     pdbg_target_index(procTarget))
                             .c_str());
@@ -113,7 +114,7 @@
                 continue;
             }
             log<level::INFO>(
-                fmt::format("Processor thread stopall completed on proc({})",
+                std::format("Processor thread stopall completed on proc({})",
                             pdbg_target_index(procTarget))
                     .c_str());
         }
@@ -125,7 +126,7 @@
         // Dont throw exception on failure because, need to proceed
         // further to complete power-off/reboot.
         log<level::ERR>(
-            fmt::format("threadStopAll: Exception({})", ex.what()).c_str());
+            std::format("threadStopAll: Exception({})", ex.what()).c_str());
 
         // To store additional data about ffdc.
         FFDCData pelAdditionalData;
diff --git a/temporary_file.cpp b/temporary_file.cpp
index 885b5ff..6352736 100644
--- a/temporary_file.cpp
+++ b/temporary_file.cpp
@@ -1,6 +1,5 @@
 #include "temporary_file.hpp"
 
-#include <fmt/format.h>
 #include <unistd.h>
 
 #include <phosphor-logging/elog-errors.hpp>
diff --git a/util.cpp b/util.cpp
index aac2a00..e03f965 100644
--- a/util.cpp
+++ b/util.cpp
@@ -1,9 +1,8 @@
 #include "util.hpp"
 
-#include <fmt/format.h>
-
 #include <phosphor-logging/elog.hpp>
 
+#include <format>
 #include <sstream>
 #include <variant>
 #include <vector>
@@ -31,7 +30,7 @@
     }
     catch (const sdbusplus::exception_t& e)
     {
-        log<level::ERR>(fmt::format("D-Bus call exception OBJPATH={}"
+        log<level::ERR>(std::format("D-Bus call exception OBJPATH={}"
                                     "INTERFACE={}  EXCEPTION={}",
                                     objectPath, interface, e.what())
                             .c_str());
@@ -67,7 +66,7 @@
         const std::string* state = std::get_if<std::string>(&retval);
         if (state == nullptr)
         {
-            std::string err = fmt::format(
+            std::string err = std::format(
                 "CurrentHostState property is not set ({})", object);
             log<level::ERR>(err.c_str());
             return false;
@@ -85,7 +84,7 @@
     catch (const std::exception& ex)
     {
         log<level::ERR>(
-            fmt::format("Failed to read CurrentHostState property ({})",
+            std::format("Failed to read CurrentHostState property ({})",
                         ex.what())
                 .c_str());
     }
@@ -116,12 +115,12 @@
     catch (const std::exception& ex)
     {
         log<level::ERR>(
-            fmt::format("Failed to read CurrentPowerState property ({})",
+            std::format("Failed to read CurrentPowerState property ({})",
                         ex.what())
                 .c_str());
     }
 
-    log<level::DEBUG>(fmt::format("Power state is: {} ", powerState).c_str());
+    log<level::DEBUG>(std::format("Power state is: {} ", powerState).c_str());
 
     return powerState;
 }