diff --git a/CHANGELOG.md b/CHANGELOG.md
index f8d9df2..9157591 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 |Version|Date|Notes|
 |---|---|---|
+|   |2021-03-02|Add ADDITIONAL_PORTS, for example `-e ADDITIONAL_PORTS='hostfwd=tcp::23-:23,'`|
 |4.0|2021-02-27|Add big-sur support. Use `sickcodes/docker-osx:big-sur` or build using `--build-arg VERSION=11`|
 |   |2021-02-26|Change `-e NOPICKER=true` to simply do `sed -i '/^.*InstallMedia.*/d' Launch.sh` and `export BOOTDISK=/home/arch/OSX-KVM/OpenCore-Catalina/OpenCore-nopicker.qcow2`.|
 |3.2|2021-02-25|Add a script to generate unique machine serial numbers. Add a script to generate a bootdisk from given serial numbers. Add Linux for libguestfs which allows the docker container to make QEMU bootdisks with specific serial numbers.|
diff --git a/CREDITS.md b/CREDITS.md
index 82f579a..ae37ee1 100644
--- a/CREDITS.md
+++ b/CREDITS.md
@@ -56,3 +56,4 @@ These credits refer to the contributors to this repository:
 
 [@MrBenFTW](https://github.com/MrBenFTW) - Tempfix for arch #150
 
+[@edsonboldrini](https://github.com/edsonboldrini) - Update README.md #161
diff --git a/Dockerfile b/Dockerfile
index 6fe698a..bff6570 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -202,6 +202,10 @@ ARG BRANCH=master
 ARG REPO='https://github.com/sickcodes/Docker-OSX.git'
 RUN git clone --branch "${BRANCH}" "${REPO}"
 
+# env -e ADDITIONAL_PORTS with a comma
+# for example, -e ADDITIONAL_PORTS=hostfwd=tcp::23-:23,
+ENV ADDITIONAL_PORTS=
+
 RUN touch Launch.sh \
     && chmod +x ./Launch.sh \
     && tee -a Launch.sh <<< '#!/bin/sh' \
@@ -225,7 +229,7 @@ RUN touch Launch.sh \
     && tee -a Launch.sh <<< '-drive id=InstallMedia,if=none,file=/home/arch/OSX-KVM/BaseSystem.img,format=qcow2 \' \
     && tee -a Launch.sh <<< '-drive id=MacHDD,if=none,file=${IMAGE_PATH:-/home/arch/OSX-KVM/mac_hdd_ng.img},format=qcow2 \' \
     && tee -a Launch.sh <<< '-device ide-hd,bus=sata.4,drive=MacHDD \' \
-    && tee -a Launch.sh <<< '-netdev user,id=net0,hostfwd=tcp::${INTERNAL_SSH_PORT:-10022}-:22,hostfwd=tcp::${SCREEN_SHARE_PORT:-5900}-:5900, \' \
+    && tee -a Launch.sh <<< '-netdev user,id=net0,hostfwd=tcp::${INTERNAL_SSH_PORT:-10022}-:22,hostfwd=tcp::${SCREEN_SHARE_PORT:-5900}-:5900,${ADDITIONAL_PORTS} \' \
     && tee -a Launch.sh <<< '-device ${NETWORKING:-vmxnet3},netdev=net0,id=net0,mac=${MAC_ADDRESS:-52:54:00:09:49:17} \' \
     && tee -a Launch.sh <<< '-monitor stdio \' \
     && tee -a Launch.sh <<< '-vga vmware \' \