diff --git a/src/main.rs b/src/main.rs
index 333c4d4..9fb094b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -25,7 +25,7 @@ impl EventHandler for Handler {
 
 #[tokio::main]
 async fn main() {
-    let file_path = std::env::var("CONFIG_PATH").unwrap_or("./config.json");
+    let file_path = std::env::var("CONFIG_PATH").unwrap_or_else(|| "./config.json".to_string());
     println!("reading config from {file_path}");
     let file = fs::read_to_string(file_path).unwrap();
     let config = serde_json::from_str::<ConfigFile>(&file).unwrap();