diff --git a/README.md b/README.md
index e5cdf36..21fe1eb 100644
--- a/README.md
+++ b/README.md
@@ -54,6 +54,7 @@ docker create \
   -e PUID=1000 \
   -e PGID=1000 \
   -e TZ=Europe/London \
+  -e UMASK_SET=022 `#optional` \
   -p 7878:7878 \
   -v <path to data>:/config \
   -v <path/to/movies>:/movies \
@@ -86,6 +87,7 @@ services:
       - PUID=1000
       - PGID=1000
       - TZ=Europe/London
+      - UMASK_SET=022 #optional
     volumes:
       - <path to data>:/config
       - <path/to/movies>:/movies
@@ -105,6 +107,7 @@ Container images are configured using parameters passed at runtime (such as thos
 | `-e PUID=1000` | for UserID - see below for explanation |
 | `-e PGID=1000` | for GroupID - see below for explanation |
 | `-e TZ=Europe/London` | Specify a timezone to use EG Europe/London, this is required for Radarr |
+| `-e UMASK_SET=022` | control permissions of files and directories created by Radarr |
 | `-v /config` | Database and Radarr configs |
 | `-v /movies` | Location of Movie library on disk |
 | `-v /downloads` | Location of download managers output directory |
@@ -191,6 +194,7 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
+* **13.06.19:** - Add env variable for setting umask.
 * **10.05.19:** - Rebase to Bionic.
 * **23.03.19:** - Switching to new Base images, shift to arm32v7 tag.
 * **09.09.18:** - Add pipeline build process.
diff --git a/readme-vars.yml b/readme-vars.yml
index f7ec85d..be42074 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -40,6 +40,10 @@ param_ports:
 param_usage_include_env: true
 param_env_vars:
   - { env_var: "TZ", env_value: "Europe/London", desc: "Specify a timezone to use EG Europe/London, this is required for Radarr"}
+# optional env variables
+opt_param_usage_include_env: true
+opt_param_env_vars:
+  - { env_var: "UMASK_SET", env_value: "022", desc: "control permissions of files and directories created by Radarr"}
 
 # application setup block
 app_setup_block_enabled: true
@@ -48,6 +52,7 @@ app_setup_block: |
 
 # changelog
 changelogs:
+  - { date: "13.06.19:", desc: "Add env variable for setting umask." }
   - { date: "10.05.19:", desc: "Rebase to Bionic." }
   - { date: "23.03.19:", desc: "Switching to new Base images, shift to arm32v7 tag." }
   - { date: "09.09.18:", desc: "Add pipeline build process." }
diff --git a/root/etc/services.d/radarr/run b/root/etc/services.d/radarr/run
index 3867e15..7214523 100644
--- a/root/etc/services.d/radarr/run
+++ b/root/etc/services.d/radarr/run
@@ -1,5 +1,9 @@
 #!/usr/bin/with-contenv bash
 
+UMASK_SET=${UMASK_SET:-022}
+
+umask "$UMASK_SET"
+
 cd /opt/radarr || exit
 
 exec \