diff --git a/images/docker-emby.md b/images/docker-emby.md
index d02c455c7..4186cbc95 100755
--- a/images/docker-emby.md
+++ b/images/docker-emby.md
@@ -45,6 +45,7 @@ docker create \
   -e PUID=1000 \
   -e PGID=1000 \
   -e TZ=Europe/London \
+  -e UMASK_SET=<022> `#optional` \
   -p 8096:8096 \
   -p 8920:8920 `#optional` \
   -v /path/to/library:/config \
@@ -72,6 +73,7 @@ services:
       - PUID=1000
       - PGID=1000
       - TZ=Europe/London
+      - UMASK_SET=<022> #optional
     volumes:
       - /path/to/library:/config
       - /path/to/tvshows:/data/tvshows
@@ -106,6 +108,7 @@ Docker images are configured using parameters passed at runtime (such as those a
 | `PUID=1000` | for UserID - see below for explanation |
 | `PGID=1000` | for GroupID - see below for explanation |
 | `TZ=Europe/London` | Specify a timezone to use EG Europe/London |
+| `UMASK_SET=<022>` | for umask setting of Emby, default if left unset is 022. |
 
 ### Volume Mappings (`-v`)
 
@@ -168,5 +171,6 @@ We automatically add the necessary environment variable that will utilise all th
 
 ## Versions
 
+* **13.08.19:** - Add umask environment variable.
 * **24.06.19:** - Fix typos in readme.
 * **30.05.19:** - Initial release.