diff --git a/Dockerfile b/Dockerfile
index 7c765a2..26f7360 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,13 +1,13 @@
-FROM lsiobase/alpine:3.6
-MAINTAINER saarg
+FROM lsiobase/alpine:3.7
 
 # set version label
 ARG BUILD_DATE
 ARG VERSION
 LABEL build_version="Linuxserver.io version:- ${VERSION} Build-date:- ${BUILD_DATE}"
+LABEL maintainer="saarg"
 
-# install build packages
 RUN \
+ echo "**** install build packages ****" && \
  apk add --no-cache --virtual=build-dependencies \
 	bzr \
 	curl \
@@ -19,8 +19,7 @@ RUN \
 	libressl-dev \
 	pcsc-lite-dev \
 	tar && \
-
-# install runtime packages
+ echo "**** install runtime packages ****" && \
  apk add --no-cache \
 	ccid \
 	libcrypto1.0 \
@@ -28,8 +27,7 @@ RUN \
 	libusb \
 	pcsc-lite \
 	pcsc-lite-libs && \
-
-# compile oscam from source
+ echo "**** compile oscam ****" && \
  bzr branch lp:oscam /tmp/oscam-svn && \
  cd /tmp/oscam-svn && \
  ./config.sh \
@@ -44,20 +42,31 @@ RUN \
 	LCDSUPPORT \
 	LEDSUPPORT \
 	READ_SDT_CHARSETS && \
- make \
+  echo "**** attempt to set number of cores available for make to use ****" && \
+ set -ex && \
+ CPU_CORES=$( < /proc/cpuinfo grep -c processor ) || echo "failed cpu look up" && \
+ if echo $CPU_CORES | grep -E  -q '^[0-9]+$'; then \
+	: ;\
+ if [ "$CPU_CORES" -gt 7 ]; then \
+	CPU_CORES=$(( CPU_CORES  - 3 )); \
+ elif [ "$CPU_CORES" -gt 5 ]; then \
+	CPU_CORES=$(( CPU_CORES  - 2 )); \
+ elif [ "$CPU_CORES" -gt 3 ]; then \
+	CPU_CORES=$(( CPU_CORES  - 1 )); fi \
+ else CPU_CORES="1"; fi && \
+ make -j $CPU_CORES \
 	CONF_DIR=/config \
 	DEFAULT_PCSC_FLAGS="-I/usr/include/PCSC" \
 	NO_PLUS_TARGET=1 \
 	OSCAM_BIN=/usr/bin/oscam \
 	pcsc-libusb && \
-
-# fix broken permissions from pcscd install.
+ set +ex && \
+ echo "**** fix broken permissions from pcscd install ****" && \
  chown root:root \
 	/usr/sbin/pcscd && \
  chmod 755 \
 	/usr/sbin/pcscd && \
-
-# install PCSC drivers for OmniKey devices
+ echo "**** install PCSC drivers ****" && \
  mkdir -p \
 	/tmp/omnikey && \
  curl -o \
@@ -68,13 +77,11 @@ RUN \
 	/tmp/omnikey --strip-components=2 && \
  cd /tmp/omnikey && \
  ./install && \
-
-# fix group for card readers and add abc to dialout group
+ echo "**** fix group for card readers and add abc to dialout group ****" && \
  groupmod -g 24 cron && \
  groupmod -g 16 dialout && \
  usermod -a -G 16 abc && \
-
-# cleanup
+ echo "**** cleanup ****" && \
  apk del --purge \
 	build-dependencies && \
  rm -rf \
diff --git a/README.md b/README.md
index 3a0743b..35e0c5c 100644
--- a/README.md
+++ b/README.md
@@ -100,10 +100,11 @@ The web interface is at port 8888.
 
 ## Versions
 
-+ **19.10.2017:** Add ccid package for usb card readers.
-+ **17.10.2017:** Switch to using bzr for source code, streamboard awol.
-+ **28.05.2017:** Rebase to alpine 3.6.
-+ **09.02.2017:** Rebase to alpine 3.5.
-+ **14.10.2016:** Add version layer information.
-+ **02.10.2016:** Add info on passing through devices to README.
-+ **25.09.2016:** Initial release.
++ **13.12.17:** Rebase to alpine 3.7.
++ **19.10.17:** Add ccid package for usb card readers.
++ **17.10.17:** Switch to using bzr for source code, streamboard awol.
++ **28.05.17:** Rebase to alpine 3.6.
++ **09.02.17:** Rebase to alpine 3.5.
++ **14.10.16:** Add version layer information.
++ **02.10.16:** Add info on passing through devices to README.
++ **25.09.16:** Initial release.