diff --git a/website/docs/events/transports.md b/website/docs/events/transports.md
index a47245694..6d864c465 100644
--- a/website/docs/events/transports.md
+++ b/website/docs/events/transports.md
@@ -19,7 +19,7 @@ This will send a POST request to the given URL with the following contents:
 
 The `Content-Type` header is set to `text/json`.
 
-Starting in 2021.10, you can also select a Notification mapping. This allows you to freely configure the request's payload. For example:
+Starting in 2021.9, you can also select a Notification mapping. This allows you to freely configure the request's payload. For example:
 
 ```python
 return {
diff --git a/website/docs/flow/stages/authenticator_duo/index.md b/website/docs/flow/stages/authenticator_duo/index.md
index 5802f3f25..4502ed310 100644
--- a/website/docs/flow/stages/authenticator_duo/index.md
+++ b/website/docs/flow/stages/authenticator_duo/index.md
@@ -17,7 +17,7 @@ Due to the way the Duo API works, authentik cannot automatically import existing
 :::
 
 :::info
-This API requires version 2021.10.1 or later
+This API requires version 2021.9.1 or later
 :::
 
 You can call the `/api/v3/stages/authenticator/duo/{stage_uuid}/import_devices/` endpoint ([see here](https://goauthentik.io/api/#post-/stages/authenticator/duo/-stage_uuid-/import_devices/)) using the following parameters:
diff --git a/website/docs/outposts/manual-deploy-docker-compose.md b/website/docs/outposts/manual-deploy-docker-compose.md
index 602c241a3..3539a7634 100644
--- a/website/docs/outposts/manual-deploy-docker-compose.md
+++ b/website/docs/outposts/manual-deploy-docker-compose.md
@@ -22,7 +22,7 @@ services:
       AUTHENTIK_HOST: https://your-authentik.tld
       AUTHENTIK_INSECURE: "false"
       AUTHENTIK_TOKEN: token-generated-by-authentik
-      # Starting with 2021.10, you can optionally set this too
+      # Starting with 2021.9, you can optionally set this too
       # when authentik_host for internal communication doesn't match the public URL
       # AUTHENTIK_HOST_BROWSER: https://external-domain.tld
   # Or, for the LDAP Outpost
diff --git a/website/docs/providers/proxy/forward_auth.mdx b/website/docs/providers/proxy/forward_auth.mdx
index aeabd3a15..17ad55302 100644
--- a/website/docs/providers/proxy/forward_auth.mdx
+++ b/website/docs/providers/proxy/forward_auth.mdx
@@ -215,7 +215,7 @@ services:
       AUTHENTIK_HOST: https://your-authentik.tld
       AUTHENTIK_INSECURE: "false"
       AUTHENTIK_TOKEN: token-generated-by-authentik
-      # Starting with 2021.10, you can optionally set this too
+      # Starting with 2021.9, you can optionally set this too
       # when authentik_host for internal communication doesn't match the public URL
       # AUTHENTIK_HOST_BROWSER: https://external-domain.tld
     labels: