diff --git a/src/main.rs b/src/main.rs
index 515699c..0acf1c0 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -144,7 +144,7 @@ async fn pull(
 fn load_config() -> anyhow::Result<Config> {
     config::ConfigBuilder::<DefaultState>::default()
         .add_source(config::File::new("config", FileFormat::Toml).required(false))
-        .add_source(config::Environment::with_prefix("PK_AVATAR").separator("_"))
+        .add_source(config::Environment::with_prefix("PK_AVATAR").prefix_separator("__").separator("_"))
         .build()?
         .try_deserialize::<Config>()
         .map_err(Into::into)