diff --git a/CHANGELOG.md b/CHANGELOG.md
index 56d0eb77..3e8e24c0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,7 +3,7 @@
 FEATURES:
 
 * **New Resource:** `dnsimple_email_forward` ([#29](https://github.com/terraform-providers/terraform-provider-dnsimple/pull/29), [#30](https://github.com/terraform-providers/terraform-provider-dnsimple/pull/30))
-
+* Abilty to switch to sandbox environment ([#12](https://github.com/terraform-providers/terraform-provider-dnsimple/pull/12))
 
 ## 0.4.0 (May 12, 2020)
 
diff --git a/website/docs/index.html.markdown b/website/docs/index.html.markdown
index 2e8ae55c..3b30b6e3 100644
--- a/website/docs/index.html.markdown
+++ b/website/docs/index.html.markdown
@@ -57,3 +57,4 @@ The following arguments are supported:
 
 * `token` - (Required) The DNSimple API v2 token. It must be provided, but it can also be sourced from the `DNSIMPLE_TOKEN` environment variable. Please note that this must be an [API v2 token](https://support.dnsimple.com/articles/api-access-token/). You can use either an User or Account token, but an Account token is recommended.
 * `account` - (Required) The ID of the account associated with the token. It must be provided, but it can also be sourced from the `DNSIMPLE_ACCOUNT` environment variable.
+* `sandbox` - Set to true to connects to the API [sandbox environment](https://developer.dnsimple.com/sandbox/).