diff --git a/docs/docker.sample.env b/docs/docker.sample.env
index 97085734..33ae4f49 100644
--- a/docs/docker.sample.env
+++ b/docs/docker.sample.env
@@ -1,5 +1,5 @@
 BASE_URL=yourdomain.com
-# generate one with openssl rand -base64 45
+# generate one with openssl rand -base64 32
 ROCKET_SECRET_KEY=randomstringhere
 
 # you can safely leave those defaults