diff --git a/CMakeLists.txt b/CMakeLists.txt
index efb037bb92..c00378d856 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -35,7 +35,7 @@ project( rAthena )
 if( CYGWIN )
 	unset( WIN32 )
 endif()
-set(CMAKE_CXX_STANDARD 11) # C++11...
+set(CMAKE_CXX_STANDARD 14) # C++14...
 set(CMAKE_CXX_STANDARD_REQUIRED ON) #...is required...
 #set(CMAKE_CXX_EXTENSIONS OFF) #...without compiler extensions like gnu++11
 
diff --git a/configure b/configure
index 0dba23eb87..b1180edf87 100755
--- a/configure
+++ b/configure
@@ -4538,9 +4538,9 @@ ac_compiler_gnu=$ac_cv_cxx_compiler_gnu
 
 CFLAGS="$CFLAGS -pipe -ffast-math -Wall"
 CPPFLAGS="$CPPFLAGS -I../common"
-CXXFLAGS="$CXXFLAGS -std=c++11"
-#CXXFLAGS="$CXXFLAGS -std=gnu++11"
-CXXFLAG_CLEARS="-std=c++11"
+CXXFLAGS="$CXXFLAGS -std=c++14"
+#CXXFLAGS="$CXXFLAGS -std=gnu++14"
+CXXFLAG_CLEARS="-std=c++14"
 
  { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether byte ordering is bigendian" >&5
 $as_echo_n "checking whether byte ordering is bigendian... " >&6; }
@@ -7109,7 +7109,7 @@ else
 $as_echo "no" >&6; }
 fi
 
-CXXFLAG_CLEARS="-std=c++11 $CPPFLAGS"
+CXXFLAG_CLEARS="-std=c++14 $CPPFLAGS"
 CFLAGS="$OPT_LTO $CFLAGS"
 CFLAGS_AR="$OPT_LTO_AR $CFLAGS"
 
diff --git a/configure.ac b/configure.ac
index bc8fd62b85..af73183072 100644
--- a/configure.ac
+++ b/configure.ac
@@ -483,9 +483,9 @@ AC_LANG([C++])
 
 CFLAGS="$CFLAGS -pipe -ffast-math -Wall"
 CPPFLAGS="$CPPFLAGS -I../common"
-CXXFLAGS="$CXXFLAGS -std=c++11"
-#CXXFLAGS="$CXXFLAGS -std=gnu++11"
-CXXFLAG_CLEARS="-std=c++11"
+CXXFLAGS="$CXXFLAGS -std=c++14"
+#CXXFLAGS="$CXXFLAGS -std=gnu++14"
+CXXFLAG_CLEARS="-std=c++14"
 
 AC_C_BIGENDIAN(
 	[AC_MSG_ERROR([[bigendian is not supported... stopping]])],
@@ -1355,7 +1355,7 @@ else
 	AC_MSG_RESULT([no])
 fi
 
-CXXFLAG_CLEARS="-std=c++11 $CPPFLAGS"
+CXXFLAG_CLEARS="-std=c++14 $CPPFLAGS"
 CFLAGS="$OPT_LTO $CFLAGS" 
 CFLAGS_AR="$OPT_LTO_AR $CFLAGS"
 AC_SUBST([CFLAGS_AR])