diff --git a/containers/zammad/docker-entrypoint.sh b/containers/zammad/docker-entrypoint.sh
index 4c7c4be..b6e21f5 100755
--- a/containers/zammad/docker-entrypoint.sh
+++ b/containers/zammad/docker-entrypoint.sh
@@ -27,8 +27,7 @@ set -e
 : "${ZAMMAD_RAILSSERVER_PORT:=3000}"
 : "${ZAMMAD_WEBSOCKET_HOST:=zammad-websocket}"
 : "${ZAMMAD_WEBSOCKET_PORT:=6042}"
-: "${ZAMMAD_WEB_CONCURRENCY:=0}"
-: "${ZAMMAD_SESSION_JOBS_CONCURRENT:=}"
+: "${ZAMMAD_WEB_CONCURRENCY:=1}"
 
 function check_zammad_ready {
   sleep 15
@@ -140,11 +139,6 @@ fi
 if [ "$1" = 'zammad-railsserver' ]; then
   test -f /opt/zammad/tmp/pids/server.pid && rm /opt/zammad/tmp/pids/server.pid
 
-  PUMA_OPTS=''
-  if (( ZAMMAD_WEB_CONCURRENCY > 1 )); then
-    PUMA_OPTS=" -w $ZAMMAD_WEB_CONCURRENCY"
-  fi
-
   check_zammad_ready
 
   cd "${ZAMMAD_DIR}"
@@ -152,7 +146,7 @@ if [ "$1" = 'zammad-railsserver' ]; then
   echo "starting railsserver... with WEB_CONCURRENCY=${ZAMMAD_WEB_CONCURRENCY}"
 
   #shellcheck disable=SC2101
-  exec bundle exec puma -b [::]:"${ZAMMAD_RAILSSERVER_PORT}" "${PUMA_OPTS}" -e "${RAILS_ENV}" -C "/opt/zammad/config/puma.rb"
+  exec bundle exec puma -b tcp://[::]:"${ZAMMAD_RAILSSERVER_PORT}" -w "${ZAMMAD_WEB_CONCURRENCY}" -e "${RAILS_ENV}"
 fi