diff --git a/README.md b/README.md
index c2a418d..5592c4e 100644
--- a/README.md
+++ b/README.md
@@ -10,6 +10,7 @@
 # Overview
 DMR++ files generator is a cloud based activity that generate DMRPP files from netCDF4 and HDF files
 ## 📖 Documentation
+- Release note [v4.0.9](https://ghrcdaac.github.io/dmrpp-generator/#v409).
 - Release note [v4.0.8](https://ghrcdaac.github.io/dmrpp-generator/#v408).
 - Release note [v4.0.7](https://ghrcdaac.github.io/dmrpp-generator/#v407).
 - Release note [v4.0.6](https://ghrcdaac.github.io/dmrpp-generator/#v406).
@@ -212,4 +213,13 @@ if not configured. There are two ways to provide a custom value.
 2. Adding `get_dmrpp_timeout` to the collection definition: `collection.meta.dmrpp`
 
 If the value is provided in the collection definition this will take precedence over the environment
-variable. 
+variable.
+
+## Subprocess Logging Configuration
+When making the subprocess call, stdout and stderr will default to `None` to prevent an issue from occurring where the 
+timeout is not respected. This can be configured in two ways.
+1. Setting the `ENABLE_SUBPROCESS_LOGGING` environment variable in terraform
+2. Adding `enable_subprocess_logging` to the collection definition: `collection.meta.dmrpp`. Can be `true` or `false`.
+
+If the value is provided in the collection definition this will take precedence over the environment
+variable.
diff --git a/docs/index.md b/docs/index.md
index e4cd9ea..4b74e1a 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -1,5 +1,18 @@
 
 # 📖 Release notes
+## v4.0.9
+This release:
+* The subprocess will have stdout and stderr default to None to reduce log spam. It can be enabled by passing 
+"enable_subprocess_logging": true into the event or setting the environment variable ENABLE_SUBPROCESS_LOGGING.
+## 🏃 Migration Steps to v4.0.9
+```code
+module "dmrpp-generator" {
+// Change the source url in your terraform file to point to v4.0.9
+source = "https://github.com/ghrcdaac/dmrpp-generator/releases/download/v4.0.9/dmrpp-generator.zip"
+...
+}
+```
+
 ## v4.0.8
 This release:
 * default_log_retention_days is now configurable