diff --git a/Dockerfile b/Dockerfile
index 2c4838a..b4e3d51 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -57,5 +57,5 @@ COPY --from=buildstage /tmp/sync/syncthing /usr/bin/
 COPY root/ /
 
 # ports and volumes
-EXPOSE 8384 22000 21027/UDP
+EXPOSE 8384 22000/tcp 22000/udp 21027/UDP
 VOLUME /config
diff --git a/Dockerfile.aarch64 b/Dockerfile.aarch64
index bd28a57..6234ae4 100644
--- a/Dockerfile.aarch64
+++ b/Dockerfile.aarch64
@@ -57,5 +57,5 @@ COPY --from=buildstage /tmp/sync/syncthing /usr/bin/
 COPY root/ /
 
 # ports and volumes
-EXPOSE 8384 22000 21027/UDP
+EXPOSE 8384 22000/tcp 22000/udp 21027/UDP
 VOLUME /config
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index 390f0d1..eec20ca 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -57,5 +57,5 @@ COPY --from=buildstage /tmp/sync/syncthing /usr/bin/
 COPY root/ /
 
 # ports and volumes
-EXPOSE 8384 22000 21027/UDP
+EXPOSE 8384 22000/tcp 22000/udp 21027/UDP
 VOLUME /config
diff --git a/README.md b/README.md
index b621901..12bcd8b 100644
--- a/README.md
+++ b/README.md
@@ -87,7 +87,8 @@ services:
       - /path/to/data2:/data2
     ports:
       - 8384:8384
-      - 22000:22000
+      - 22000:22000/tcp
+      - 22000:22000/udp
       - 21027:21027/udp
     restart: unless-stopped
 ```
@@ -102,7 +103,8 @@ docker run -d \
   -e PGID=1000 \
   -e TZ=Europe/London \
   -p 8384:8384 \
-  -p 22000:22000 \
+  -p 22000:22000/tcp \
+  -p 22000:22000/udp \
   -p 21027:21027/udp \
   -v /path/to/appdata/config:/config \
   -v /path/to/data1:/data1 \
@@ -119,7 +121,8 @@ Container images are configured using parameters passed at runtime (such as thos
 | :----: | --- |
 | `--hostname=` | Optionally the hostname can be defined. |
 | `-p 8384` | Application WebUI |
-| `-p 22000` | Listening port |
+| `-p 22000/tcp` | Listening port (TCP) |
+| `-p 22000/udp` | Listening port (UDP) |
 | `-p 21027/udp` | Protocol discovery |
 | `-e PUID=1000` | for UserID - see below for explanation |
 | `-e PGID=1000` | for GroupID - see below for explanation |
@@ -237,6 +240,7 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
+* **03.05.21:** - Add port mapping for 22000/udp.
 * **29.01.21:** - Deprecate `UMASK_SET` in favor of UMASK in baseimage, see above for more information.
 * **23.01.21:** - Rebasing to alpine 3.13.
 * **15.09.20:** - Use go from alpine edge repo to compile. Remove duplicate UMASK env var. Add hostname setting.
diff --git a/readme-vars.yml b/readme-vars.yml
index 4644ac0..b90c324 100755
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -30,7 +30,8 @@ param_volumes:
 param_usage_include_ports: true
 param_ports:
   - { external_port: "8384", internal_port: "8384", port_desc: "Application WebUI" }
-  - { external_port: "22000", internal_port: "22000", port_desc: "Listening port" }
+  - { external_port: "22000", internal_port: "22000/tcp", port_desc: "Listening port (TCP)" }
+  - { external_port: "22000", internal_port: "22000/udp", port_desc: "Listening port (UDP)" }
   - { external_port: "21027", internal_port: "21027/udp", port_desc: "Protocol discovery" }
 custom_params:
   - { name: "sysctl", name_compose: "sysctls", value: ["net.core.rmem_max=2097152"], desc: "Raise maximum UDP buffer size.", array: "true" }
@@ -45,6 +46,7 @@ app_setup_nginx_reverse_proxy_block: ""
 
 changelogs:
   - { date: "03.05.21:", desc: "Raise maximum UDP buffer size." }
+  - { date: "03.05.21:", desc: "Add port mapping for 22000/udp." }
   - { date: "29.01.21:", desc: "Deprecate `UMASK_SET` in favor of UMASK in baseimage, see above for more information." }
   - { date: "23.01.21:", desc: "Rebasing to alpine 3.13." }
   - { date: "15.09.20:", desc: "Use go from alpine edge repo to compile. Remove duplicate UMASK env var. Add hostname setting." }