diff --git a/Dockerfile b/Dockerfile
index 976a4ec4..62802055 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -30,6 +30,7 @@
 #   -e SECRET_DO_SPACES_SECRET = w6XLSH+BNLmPDyiyzA6wrIZ4riCf94uM3Cpw83B3ldg \
 #   -e SECRET_DO_SPACES_BUCKET = hemmelig \
 #   -e SECRET_DO_SPACES_FOLDER = localhost.hemmelig.app \
+#   -e SECRET_MAX_TEXT_SIZE = 1024 \
 #   hemmeligapp/hemmelig:latest
 
 FROM node:lts-alpine
diff --git a/README.md b/README.md
index 32432f48..9c621603 100644
--- a/README.md
+++ b/README.md
@@ -67,6 +67,7 @@ Have a look at the Dockerfile for a full example of how to run this application.
 -   `SECRET_DO_SPACES_SECRET` Default: "" - The Spaces secret
 -   `SECRET_DO_SPACES_BUCKET` Default: "" - The Spaces bucket name
 -   `SECRET_DO_SPACES_FOLDER` Default: "" - The Spaces folder for uploading
+-   `SECRET_MAX_TEXT_SIZE` Default: "256" - The max text size for the secret. Is set in kb. i.e. 256 for 256kb.
 
 ## Run locally