diff --git a/src/router/gree.rs b/src/router/gree.rs
index 83b61f3..b9f4307 100644
--- a/src/router/gree.rs
+++ b/src/router/gree.rs
@@ -21,7 +21,7 @@ use openssl::hash::MessageDigest;
use openssl::sign::Verifier;
lazy_static! {
- pub static ref ENGINE: Mutex