diff --git a/docs/configuration-config-file.md b/docs/configuration-config-file.md
index 39c5c2045..eacb26acf 100644
--- a/docs/configuration-config-file.md
+++ b/docs/configuration-config-file.md
@@ -81,7 +81,7 @@ these are rarely used for various reasons.
 
 | variables | example values | description |
 | --------- | ------ | ----------- |
-| `allowGravatar` | `true` or `false` | set to `false` to disable Gravatar as profile picture source on your instance |
+| `allowGravatar` | `true` or `false` | set to `false` to disable Libravatar as profile picture source on your instance. Libravatar is a federated open-source alternative to Gravatar. |
 | `useCDN` | `true` or `false` | set to use CDN resources or not (default is `true`) |
 
 ## Users and Privileges
diff --git a/docs/configuration-env-vars.md b/docs/configuration-env-vars.md
index 1f44083ed..eb4bbbe08 100644
--- a/docs/configuration-env-vars.md
+++ b/docs/configuration-env-vars.md
@@ -68,7 +68,7 @@ defaultNotePath can't be set from env-vars
 
 | variable | example value | description |
 | -------- | ------------- | ----------- |
-| `CMD_ALLOW_GRAVATAR` | `true` or `false` | set to `false` to disable gravatar as profile picture source on your instance |
+| `CMD_ALLOW_GRAVATAR` | `true` or `false` | set to `false` to disable Libravatar as profile picture source on your instance. Libravatar is a federated open-source alternative to Gravatar. |
 | `CMD_USECDN` | `true` or `false` | set to use CDN resources or not|