diff --git a/server/server.go b/server/server.go
index 7229e06..3e29a0b 100644
--- a/server/server.go
+++ b/server/server.go
@@ -239,6 +239,7 @@ func main() {
 		if err != nil {
 			log.Fatalf("can't open log file: %s", err)
 		}
+		defer f.Close()
 		log.SetOutput(f)
 	}