diff --git a/README.md b/README.md
index c326ae0..236c225 100644
--- a/README.md
+++ b/README.md
@@ -145,7 +145,7 @@ You can specify configuration options either via a config file (default: `config
 | `app.inactive_days` /<br>`WAKAPI_INACTIVE_DAYS`                              | `7`                                              | Number of days after which to consider a user inactive (only for metrics)                                                                                                |
 | `app.heartbeat_max_age /`<br>`WAKAPI_HEARTBEAT_MAX_AGE`                      | `4320h`                                          | Maximum acceptable age of a heartbeat (see [`ParseDuration`](https://pkg.go.dev/time#ParseDuration))                                                                     |
 | `app.custom_languages`                                                       | -                                                | Map from file endings to language names                                                                                                                                  |
-| `app.avatar_url_template`                                                    | (see [`config.default.yml`](config.default.yml)) | URL template for external user avatar images (e.g. from [Dicebear](https://dicebear.com) or [Gravatar](https://gravatar.com))                                            |
+| `app.avatar_url_template` /<br>`WAKAPI_AVATAR_URL_TEMPLATE`                  | (see [`config.default.yml`](config.default.yml)) | URL template for external user avatar images (e.g. from [Dicebear](https://dicebear.com) or [Gravatar](https://gravatar.com))                                            |
 | `server.port` /<br> `WAKAPI_PORT`                                            | `3000`                                           | Port to listen on                                                                                                                                                        |
 | `server.listen_ipv4` /<br> `WAKAPI_LISTEN_IPV4`                              | `127.0.0.1`                                      | IPv4 network address to listen on (leave blank to disable IPv4)                                                                                                          |
 | `server.listen_ipv6` /<br> `WAKAPI_LISTEN_IPV6`                              | `::1`                                            | IPv6 network address to listen on (leave blank to disable IPv6)                                                                                                          |
diff --git a/config/config.go b/config/config.go
index 72b6b7d..572e455 100644
--- a/config/config.go
+++ b/config/config.go
@@ -70,7 +70,7 @@ type appConfig struct {
 	InactiveDays      int                          `yaml:"inactive_days" default:"7" env:"WAKAPI_INACTIVE_DAYS"`
 	HeartbeatMaxAge   string                       `yaml:"heartbeat_max_age" default:"4320h" env:"WAKAPI_HEARTBEAT_MAX_AGE"`
 	CountCacheTTLMin  int                          `yaml:"count_cache_ttl_min" default:"30" env:"WAKAPI_COUNT_CACHE_TTL_MIN"`
-	AvatarURLTemplate string                       `yaml:"avatar_url_template" default:"api/avatar/{username_hash}.svg"`
+	AvatarURLTemplate string                       `yaml:"avatar_url_template" default:"api/avatar/{username_hash}.svg" env:"WAKAPI_AVATAR_URL_TEMPLATE"`
 	CustomLanguages   map[string]string            `yaml:"custom_languages"`
 	Colors            map[string]map[string]string `yaml:"-"`
 }