diff --git a/extras/vpnupgrade.sh b/extras/vpnupgrade.sh
index e3b1137..a79864b 100644
--- a/extras/vpnupgrade.sh
+++ b/extras/vpnupgrade.sh
@@ -146,7 +146,9 @@ EOF
 if [ "$(packaging/utils/lswan_detect.sh init)" = "systemd" ]; then
   apt-get -yq install libsystemd-dev || exiterr2
 fi
-make -s base && make -s install-base
+NPROCS="$(grep -c ^processor /proc/cpuinfo)"
+[ -z "$NPROCS" ] && NPROCS=1
+make "-j$((NPROCS+1))" -s base && make -s install-base
 
 # Verify the install and clean up
 cd /opt/src || exiterr "Cannot enter /opt/src."
diff --git a/extras/vpnupgrade_centos.sh b/extras/vpnupgrade_centos.sh
index 7030d17..1b04fc6 100644
--- a/extras/vpnupgrade_centos.sh
+++ b/extras/vpnupgrade_centos.sh
@@ -143,7 +143,9 @@ cat > Makefile.inc.local <<'EOF'
 WERROR_CFLAGS =
 USE_DNSSEC = false
 EOF
-make -s base && make -s install-base
+NPROCS="$(grep -c ^processor /proc/cpuinfo)"
+[ -z "$NPROCS" ] && NPROCS=1
+make "-j$((NPROCS+1))" -s base && make -s install-base
 
 # Verify the install and clean up
 cd /opt/src || exiterr "Cannot enter /opt/src."
diff --git a/vpnsetup.sh b/vpnsetup.sh
index bb89b3f..ca280da 100755
--- a/vpnsetup.sh
+++ b/vpnsetup.sh
@@ -193,7 +193,9 @@ EOF
 if [ "$(packaging/utils/lswan_detect.sh init)" = "systemd" ]; then
   apt-get -yq install libsystemd-dev || exiterr2
 fi
-make -s base && make -s install-base
+NPROCS="$(grep -c ^processor /proc/cpuinfo)"
+[ -z "$NPROCS" ] && NPROCS=1
+make "-j$((NPROCS+1))" -s base && make -s install-base
 
 # Verify the install and clean up
 cd /opt/src || exiterr "Cannot enter /opt/src."
diff --git a/vpnsetup_centos.sh b/vpnsetup_centos.sh
index e294341..290ef44 100755
--- a/vpnsetup_centos.sh
+++ b/vpnsetup_centos.sh
@@ -188,7 +188,9 @@ cat > Makefile.inc.local <<'EOF'
 WERROR_CFLAGS =
 USE_DNSSEC = false
 EOF
-make -s base && make -s install-base
+NPROCS="$(grep -c ^processor /proc/cpuinfo)"
+[ -z "$NPROCS" ] && NPROCS=1
+make "-j$((NPROCS+1))" -s base && make -s install-base
 
 # Verify the install and clean up
 cd /opt/src || exiterr "Cannot enter /opt/src."