diff --git a/internal/config/env.go b/internal/config/env.go
index 633beba..6d33d2a 100644
--- a/internal/config/env.go
+++ b/internal/config/env.go
@@ -65,7 +65,7 @@ func Load() (*Config, error) {
 }
 
 func getenv(key, fallback string) string {
-	if v := os.Getenv(key); v != "" {
+	if v, ok := os.LookupEnv(key); ok {
 		return v
 	}
 	return fallback