diff --git a/README.md b/README.md
index 9ea4dbb..b2ea0e7 100644
--- a/README.md
+++ b/README.md
@@ -116,7 +116,8 @@ services:
       - PUID=1000
       - PGID=1000
       - TZ=Europe/London
-      - DOCKER_MODS=linuxserver/calibre-web:calibre
+      - DOCKER_MODS=linuxserver/calibre-web:calibre #optional
+      - OAUTHLIB_RELAX_TOKEN_SCOPE=1 #optional
     volumes:
       - /path/to/data:/config
       - /path/to/calibre/library:/books
@@ -133,7 +134,8 @@ docker run -d \
   -e PUID=1000 \
   -e PGID=1000 \
   -e TZ=Europe/London \
-  -e DOCKER_MODS=linuxserver/calibre-web:calibre \
+  -e DOCKER_MODS=linuxserver/calibre-web:calibre `#optional` \
+  -e OAUTHLIB_RELAX_TOKEN_SCOPE=1 `#optional` \
   -p 8083:8083 \
   -v /path/to/data:/config \
   -v /path/to/calibre/library:/books \
@@ -152,6 +154,7 @@ Container images are configured using parameters passed at runtime (such as thos
 | `-e PGID=1000` | for GroupID - see below for explanation |
 | `-e TZ=Europe/London` | Specify a timezone to use EG Europe/London. |
 | `-e DOCKER_MODS=linuxserver/calibre-web:calibre` | #optional & **x86-64 only** Adds the ability to perform ebook conversion |
+| `-e OAUTHLIB_RELAX_TOKEN_SCOPE=1` | Optionally set this to allow Google OAUTH to work |
 | `-v /config` | Where calibre-web stores the internal database and config. |
 | `-v /books` | Where your preexisting calibre database is located. |
 
@@ -264,6 +267,7 @@ Once registered you can define the dockerfile to use with `-f Dockerfile.aarch64
 
 ## Versions
 
+* **24.06.21:** - Add note on optional OAUTHLIB_RELAX_TOKEN_SCOPE for Google OAUTH support.
 * **17.05.21:** - Add linuxserver wheel index.
 * **10.02.21:** - Add libxrandr2
 * **25.01.21:** - Add nightly tag
diff --git a/readme-vars.yml b/readme-vars.yml
index 40522a3..6bd0a8f 100644
--- a/readme-vars.yml
+++ b/readme-vars.yml
@@ -28,7 +28,6 @@ param_container_name: "{{ project_name }}"
 param_usage_include_env: true
 param_env_vars:
   - { env_var: "TZ", env_value: "Europe/London", desc: "Specify a timezone to use EG Europe/London." }
-  - { env_var: "DOCKER_MODS", env_value: "linuxserver/calibre-web:calibre", desc: "#optional & **x86-64 only** Adds the ability to perform ebook conversion"}
 param_usage_include_vols: true
 param_volumes:
   - { vol_path: "/config", vol_host_path: "/path/to/data", desc: "Where calibre-web stores the internal database and config." }
@@ -38,7 +37,10 @@ param_ports:
   - { external_port: "8083", internal_port: "8083", port_desc: "WebUI" }
 
 # optional container parameters
-opt_param_usage_include_env: false
+opt_param_usage_include_env: true
+opt_param_env_vars:
+  - { env_var: "DOCKER_MODS", env_value: "linuxserver/calibre-web:calibre", desc: "#optional & **x86-64 only** Adds the ability to perform ebook conversion"}
+  - { env_var: "OAUTHLIB_RELAX_TOKEN_SCOPE", env_value: "1", desc: "Optionally set this to allow Google OAUTH to work" }
 opt_param_usage_include_vols: false
 opt_param_usage_include_ports: false
 opt_param_device_map: false
@@ -77,6 +79,7 @@ app_setup_block: |
 
 # changelog
 changelogs:
+  - { date: "24.06.21:", desc: "Add note on optional OAUTHLIB_RELAX_TOKEN_SCOPE for Google OAUTH support."}
   - { date: "17.05.21:", desc: "Add linuxserver wheel index."}
   - { date: "10.02.21:", desc: "Add libxrandr2"}
   - { date: "25.01.21:", desc: "Add nightly tag"}