diff --git a/install.sh b/install.sh
old mode 100755
new mode 100644
index 99a2dce..32c9fa1
--- a/install.sh
+++ b/install.sh
@@ -10,10 +10,6 @@ dcr="$dc run --rm"
 log_file="sentry_install_log-`date +'%Y-%m-%d_%H-%M-%S'`.txt"
 exec &> >(tee -a "$log_file")
 
-MIN_DOCKER_VERSION='17.05.0'
-MIN_COMPOSE_VERSION='1.23.0'
-MIN_RAM=2400 # MB
-
 SENTRY_CONFIG_PY='sentry/sentry.conf.py'
 SENTRY_CONFIG_YML='sentry/config.yml'
 SYMBOLICATOR_CONFIG_YML='symbolicator/config.yml'
@@ -54,7 +50,7 @@ echo ""
 # We tag locally built images with an '-onpremise-local' suffix. docker-compose pull tries to pull these too and
 # shows a 404 error on the console which is confusing and unnecessary. To overcome this, we add the stderr>stdout
 # redirection below and pass it through grep, ignoring all lines having this '-onpremise-local' suffix.
-$dc pull -q --ignore-pull-failures 2>&1 | grep -v -- -onpremise-local || true
+$dc pull --quiet --ignore-pull-failures 2>&1 | grep -v -- -onpremise-local || true
 
 # We may not have the set image on the repo (local images) so allow fails
 docker pull $SENTRY_IMAGE || true;
@@ -64,7 +60,7 @@ echo "Building and tagging Docker images..."
 echo ""
 # Build the sentry onpremise image first as it is needed for the cron image
 $dc build --force-rm web
-$dc build --force-rm --parallel
+$dc build --force-rm
 echo ""
 echo "Docker images built."