diff --git a/build-aux/m4/ax_boost_system.m4 b/build-aux/m4/ax_boost_system.m4
index 1c05450c..e162087e 100644
--- a/build-aux/m4/ax_boost_system.m4
+++ b/build-aux/m4/ax_boost_system.m4
@@ -64,7 +64,7 @@ AC_DEFUN([AX_BOOST_SYSTEM],
 		LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
 		export LDFLAGS
 
-        AC_CACHE_CHECK(whether the Boost::System library is available,
+        AC_CACHE_CHECK(whether Boost::System headers are available,
 					   ax_cv_boost_system,
         [AC_LANG_PUSH([C++])
 			 CXXFLAGS_SAVE=$CXXFLAGS
@@ -80,40 +80,8 @@ AC_DEFUN([AX_BOOST_SYSTEM],
 			AC_SUBST(BOOST_CPPFLAGS)
 
 			AC_DEFINE(HAVE_BOOST_SYSTEM,,[define if the Boost::System library is available])
-            BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/@<:@^\/@:>@*//'`
-
-			LDFLAGS_SAVE=$LDFLAGS
-            if test "x$ax_boost_user_system_lib" = "x"; then
-                ax_lib=
-                for libextension in `ls -r $BOOSTLIBDIR/libboost_system* 2>/dev/null | sed 's,.*/lib,,' | sed 's,\..*,,'` ; do
-                     ax_lib=${libextension}
-				    AC_CHECK_LIB($ax_lib, exit,
-                                 [BOOST_SYSTEM_LIB="-l$ax_lib"; AC_SUBST(BOOST_SYSTEM_LIB) link_system="yes"; break],
-                                 [link_system="no"])
-				done
-                if test "x$link_system" != "xyes"; then
-                for libextension in `ls -r $BOOSTLIBDIR/boost_system* 2>/dev/null | sed 's,.*/,,' | sed -e 's,\..*,,'` ; do
-                     ax_lib=${libextension}
-				    AC_CHECK_LIB($ax_lib, exit,
-                                 [BOOST_SYSTEM_LIB="-l$ax_lib"; AC_SUBST(BOOST_SYSTEM_LIB) link_system="yes"; break],
-                                 [link_system="no"])
-				done
-                fi
-
-            else
-               for ax_lib in $ax_boost_user_system_lib boost_system-$ax_boost_user_system_lib; do
-				      AC_CHECK_LIB($ax_lib, exit,
-                                   [BOOST_SYSTEM_LIB="-l$ax_lib"; AC_SUBST(BOOST_SYSTEM_LIB) link_system="yes"; break],
-                                   [link_system="no"])
-                  done
-
-            fi
-            if test "x$ax_lib" = "x"; then
-                AC_MSG_ERROR(Could not find a version of the boost_system library!)
-            fi
-			if test "x$link_system" = "xno"; then
-				AC_MSG_ERROR(Could not link against $ax_lib !)
-			fi
+			BOOST_SYSTEM_LIB=""
+			AC_SUBST(BOOST_SYSTEM_LIB)
 		fi
 
 		CPPFLAGS="$CPPFLAGS_SAVED"
diff --git a/configure b/configure
index 4ed2c7ff..eb8d44b6 100755
--- a/configure
+++ b/configure
@@ -31105,8 +31105,8 @@ fi
 		LDFLAGS="$LDFLAGS $BOOST_LDFLAGS"
 		export LDFLAGS
 
-        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether the Boost::System library is available" >&5
-printf %s "checking whether the Boost::System library is available... " >&6; }
+        { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether Boost::System headers are available" >&5
+printf %s "checking whether Boost::System headers are available... " >&6; }
 if test ${ax_cv_boost_system+y}
 then :
   printf %s "(cached) " >&6
@@ -31155,160 +31155,8 @@ printf "%s\n" "$ax_cv_boost_system" >&6; }
 
 printf "%s\n" "#define HAVE_BOOST_SYSTEM /**/" >>confdefs.h
 
-            BOOSTLIBDIR=`echo $BOOST_LDFLAGS | sed -e 's/[^\/]*//'`
+			BOOST_SYSTEM_LIB=""
 
-			LDFLAGS_SAVE=$LDFLAGS
-            if test "x$ax_boost_user_system_lib" = "x"; then
-                ax_lib=
-                for libextension in `ls -r $BOOSTLIBDIR/libboost_system* 2>/dev/null | sed 's,.*/lib,,' | sed 's,\..*,,'` ; do
-                     ax_lib=${libextension}
-				    as_ac_Lib=`printf "%s\n" "ac_cv_lib_$ax_lib""_exit" | $as_tr_sh`
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for exit in -l$ax_lib" >&5
-printf %s "checking for exit in -l$ax_lib... " >&6; }
-if eval test \${$as_ac_Lib+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-l$ax_lib  $LIBS"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-namespace conftest {
-  extern "C" int exit ();
-}
-int
-main (void)
-{
-return conftest::exit ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_link "$LINENO"
-then :
-  eval "$as_ac_Lib=yes"
-else $as_nop
-  eval "$as_ac_Lib=no"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-eval ac_res=\$$as_ac_Lib
-	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-printf "%s\n" "$ac_res" >&6; }
-if eval test \"x\$"$as_ac_Lib"\" = x"yes"
-then :
-  BOOST_SYSTEM_LIB="-l$ax_lib";  link_system="yes"; break
-else $as_nop
-  link_system="no"
-fi
-
-				done
-                if test "x$link_system" != "xyes"; then
-                for libextension in `ls -r $BOOSTLIBDIR/boost_system* 2>/dev/null | sed 's,.*/,,' | sed -e 's,\..*,,'` ; do
-                     ax_lib=${libextension}
-				    as_ac_Lib=`printf "%s\n" "ac_cv_lib_$ax_lib""_exit" | $as_tr_sh`
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for exit in -l$ax_lib" >&5
-printf %s "checking for exit in -l$ax_lib... " >&6; }
-if eval test \${$as_ac_Lib+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-l$ax_lib  $LIBS"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-namespace conftest {
-  extern "C" int exit ();
-}
-int
-main (void)
-{
-return conftest::exit ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_link "$LINENO"
-then :
-  eval "$as_ac_Lib=yes"
-else $as_nop
-  eval "$as_ac_Lib=no"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-eval ac_res=\$$as_ac_Lib
-	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-printf "%s\n" "$ac_res" >&6; }
-if eval test \"x\$"$as_ac_Lib"\" = x"yes"
-then :
-  BOOST_SYSTEM_LIB="-l$ax_lib";  link_system="yes"; break
-else $as_nop
-  link_system="no"
-fi
-
-				done
-                fi
-
-            else
-               for ax_lib in $ax_boost_user_system_lib boost_system-$ax_boost_user_system_lib; do
-				      as_ac_Lib=`printf "%s\n" "ac_cv_lib_$ax_lib""_exit" | $as_tr_sh`
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for exit in -l$ax_lib" >&5
-printf %s "checking for exit in -l$ax_lib... " >&6; }
-if eval test \${$as_ac_Lib+y}
-then :
-  printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
-LIBS="-l$ax_lib  $LIBS"
-cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-
-namespace conftest {
-  extern "C" int exit ();
-}
-int
-main (void)
-{
-return conftest::exit ();
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_cxx_try_link "$LINENO"
-then :
-  eval "$as_ac_Lib=yes"
-else $as_nop
-  eval "$as_ac_Lib=no"
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam \
-    conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
-fi
-eval ac_res=\$$as_ac_Lib
-	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
-printf "%s\n" "$ac_res" >&6; }
-if eval test \"x\$"$as_ac_Lib"\" = x"yes"
-then :
-  BOOST_SYSTEM_LIB="-l$ax_lib";  link_system="yes"; break
-else $as_nop
-  link_system="no"
-fi
-
-                  done
-
-            fi
-            if test "x$ax_lib" = "x"; then
-                as_fn_error $? "Could not find a version of the boost_system library!" "$LINENO" 5
-            fi
-			if test "x$link_system" = "xno"; then
-				as_fn_error $? "Could not link against $ax_lib !" "$LINENO" 5
-			fi
 		fi
 
 		CPPFLAGS="$CPPFLAGS_SAVED"
diff --git a/depends/packages/boost.mk b/depends/packages/boost.mk
index e5a47b97..628d1ccf 100644
--- a/depends/packages/boost.mk
+++ b/depends/packages/boost.mk
@@ -1,11 +1,11 @@
 package=boost
-$(package)_version=1_64_0
+$(package)_version=1_91_0
 # Bintray was shut down; use the official Boost archives mirror.
 # NOTE: download_path should NOT end with a trailing slash because the fetch
 # helper appends "/$(file)".
-$(package)_download_path=https://archives.boost.io/release/1.64.0/source
+$(package)_download_path=https://archives.boost.io/release/1.91.0/source
 $(package)_file_name=$(package)_$($(package)_version).tar.bz2
-$(package)_sha256_hash=7bcc5caace97baa948931d712ea5f37038dbb1c5d89b43ad4def4ed7cb683332
+$(package)_sha256_hash=de5e6b0e4913395c6bdfa90537febd9028ea4c0735d2cdb0cd9b45d5f51264f5
 
 define $(package)_set_vars
 $(package)_config_opts_release=variant=release
@@ -26,7 +26,7 @@ $(package)_toolset_$(host_os)=gcc
 $(package)_archiver_$(host_os)=$($(package)_ar)
 $(package)_toolset_darwin=darwin
 $(package)_archiver_darwin=$($(package)_libtool)
-$(package)_config_libraries=chrono,filesystem,program_options,system,thread,test
+$(package)_config_libraries=chrono,filesystem,program_options,thread,test
 $(package)_cxxflags=-std=c++11 -fvisibility=hidden
 $(package)_cxxflags_linux=-fPIC
 endef
diff --git a/src/qt/bitcoingui.cpp b/src/qt/bitcoingui.cpp
index b42219dd..deccf76b 100644
--- a/src/qt/bitcoingui.cpp
+++ b/src/qt/bitcoingui.cpp
@@ -57,6 +57,10 @@
 #include <QUrlQuery>
 #include <QVBoxLayout>
 
+using boost::placeholders::_1;
+using boost::placeholders::_2;
+using boost::placeholders::_3;
+
 const QString BitcoinGUI::DEFAULT_WALLET = "~Default";
 
 BitcoinGUI::BitcoinGUI(const NetworkStyle* networkStyle, QWidget* parent) : QMainWindow(parent),
diff --git a/src/qt/clientmodel.cpp b/src/qt/clientmodel.cpp
index 15b1bf81..cba1ab68 100644
--- a/src/qt/clientmodel.cpp
+++ b/src/qt/clientmodel.cpp
@@ -28,6 +28,9 @@
 #include <QDebug>
 #include <QTimer>
 
+using boost::placeholders::_1;
+using boost::placeholders::_2;
+
 static const int64_t nClientStartupTime = GetTime();
 
 ClientModel::ClientModel(OptionsModel* optionsModel, QObject* parent) : QObject(parent),
diff --git a/src/qt/splashscreen.cpp b/src/qt/splashscreen.cpp
index d6453846..d2c7f7e7 100644
--- a/src/qt/splashscreen.cpp
+++ b/src/qt/splashscreen.cpp
@@ -24,6 +24,9 @@
 #include <QPainter>
 #include <QScreen>
 
+using boost::placeholders::_1;
+using boost::placeholders::_2;
+
 SplashScreen::SplashScreen(Qt::WindowFlags f, const NetworkStyle* networkStyle) : QWidget(0, f), curAlignment(0)
 {
     // set reference point, paddings
diff --git a/src/qt/transactiontablemodel.cpp b/src/qt/transactiontablemodel.cpp
index 885bcc46..cb095196 100644
--- a/src/qt/transactiontablemodel.cpp
+++ b/src/qt/transactiontablemodel.cpp
@@ -28,6 +28,10 @@
 #include <QIcon>
 #include <QList>
 
+using boost::placeholders::_1;
+using boost::placeholders::_2;
+using boost::placeholders::_3;
+
 // Amount column is right-aligned it contains numbers
 static int column_alignments[] = {
     Qt::AlignLeft | Qt::AlignVCenter, /* status */
diff --git a/src/qt/walletmodel.cpp b/src/qt/walletmodel.cpp
index 5a97e974..3cfbdfa8 100644
--- a/src/qt/walletmodel.cpp
+++ b/src/qt/walletmodel.cpp
@@ -27,6 +27,12 @@
 #include <QTimer>
 
 using namespace std;
+using boost::placeholders::_1;
+using boost::placeholders::_2;
+using boost::placeholders::_3;
+using boost::placeholders::_4;
+using boost::placeholders::_5;
+using boost::placeholders::_6;
 
 WalletModel::WalletModel(CWallet* wallet, OptionsModel* optionsModel, QObject* parent) : QObject(parent), wallet(wallet), optionsModel(optionsModel), addressTableModel(0),
                                                                                          transactionTableModel(0),
diff --git a/src/wallet/walletdb.cpp b/src/wallet/walletdb.cpp
index fccf8821..03039ab1 100644
--- a/src/wallet/walletdb.cpp
+++ b/src/wallet/walletdb.cpp
@@ -1076,7 +1076,9 @@ bool AttemptBackupWallet(const CWallet& wallet, const filesystem::path& pathSrc,
             LogPrintf("cannot backup to wallet source file %s\n", pathDest.string());
             return false;
         }
-#if BOOST_VERSION >= 105800 /* BOOST_LIB_VERSION 1_58 */
+#if BOOST_VERSION >= 107400 /* BOOST_LIB_VERSION 1_74 */
+        filesystem::copy_file(pathSrc.c_str(), pathDest, filesystem::copy_options::overwrite_existing);
+#elif BOOST_VERSION >= 105800 /* BOOST_LIB_VERSION 1_58 */
         filesystem::copy_file(pathSrc.c_str(), pathDest, filesystem::copy_option::overwrite_if_exists);
 #else
         std::ifstream src(pathSrc.c_str(),  std::ios::binary | std::ios::in);