diff --git a/ref_app/src/util/STL/cinttypes b/ref_app/src/util/STL/cinttypes
index 71915d1bc..168731795 100644
--- a/ref_app/src/util/STL/cinttypes
+++ b/ref_app/src/util/STL/cinttypes
@@ -8,7 +8,7 @@
 #ifndef CINTTYPES_2021_10_19_
   #define CINTTYPES_2021_10_19_
 
-  #if (defined(__GNUC__) && defined(__RL78__))
+  #if (defined(__GNUC__) && (defined(__RL78__) || defined(__v850__)))
   #include <stdint-gcc.h>
   #else
   #include <inttypes.h>
diff --git a/ref_app/target/micros/v850es_fx2/make/v850es_fx2_flags.gmk b/ref_app/target/micros/v850es_fx2/make/v850es_fx2_flags.gmk
index 3635665c1..59af484fe 100644
--- a/ref_app/target/micros/v850es_fx2/make/v850es_fx2_flags.gmk
+++ b/ref_app/target/micros/v850es_fx2/make/v850es_fx2_flags.gmk
@@ -1,5 +1,5 @@
 #
-#  Copyright Christopher Kormanyos 2014 - 2024.
+#  Copyright Christopher Kormanyos 2014 - 2025.
 #  Distributed under the Boost Software License,
 #  Version 1.0. (See accompanying file LICENSE_1_0.txt
 #  or copy at http://www.boost.org/LICENSE_1_0.txt)
@@ -9,7 +9,7 @@
 # compiler flags for the target architecture
 # ------------------------------------------------------------------------------
 
-GCC_VERSION   = 13.2.0
+GCC_VERSION   = 14.2.0
 GCC_TARGET    = v850-unknown-elf
 GCC_PREFIX    = v850-unknown-elf
 
@@ -23,13 +23,14 @@ TGT_ALLFLAGS  = -Os                                            \
                 -mzda=0                                        \
                 -msda=0                                        \
                 -finline-functions                             \
-                -finline-limit=32
+                -finline-limit=32                              \
+                -ffreestanding
 
-TGT_CFLAGS    = -std=c99                                       \
+TGT_CFLAGS    = -std=c11                                       \
                 -Wunsuffixed-float-constants                   \
                 $(TGT_ALLFLAGS)
 
-TGT_CXXFLAGS  = -std=c++14                                     \
+TGT_CXXFLAGS  = -std=c++23                                     \
                 $(TGT_ALLFLAGS)
 
 TGT_INCLUDES  = -isystem $(PATH_APP)/util/STL