diff --git a/src/lib.rs b/src/lib.rs
index 94cc219..7204fcd 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -76,20 +76,17 @@ struct OnlineWallet {
     wallet: Mutex<Wallet<AnyBlockchain, AnyDatabase>>,
 }
 
-pub trait BdkProgress: Send {
+pub trait BdkProgress: Send + Sync {
     fn update(&self, progress: f32, message: Option<String>);
 }
 
 struct BdkProgressHolder {
-    progress_update: Mutex<Box<dyn BdkProgress>>,
+    progress_update: Box<dyn BdkProgress>,
 }
 
 impl Progress for BdkProgressHolder {
     fn update(&self, progress: f32, message: Option<String>) -> Result<(), Error> {
-        self.progress_update
-            .lock()
-            .unwrap()
-            .update(progress, message);
+        self.progress_update.update(progress, message);
         Ok(())
     }
 }
@@ -147,12 +144,10 @@ impl OnlineWallet {
         max_address_param: Option<u32>,
     ) -> Result<(), BdkError> {
         progress_update.update(21.0, Some("message".to_string()));
-        self.wallet.lock().unwrap().sync(
-            BdkProgressHolder {
-                progress_update: Mutex::new(progress_update),
-            },
-            max_address_param,
-        )
+        self.wallet
+            .lock()
+            .unwrap()
+            .sync(BdkProgressHolder { progress_update }, max_address_param)
     }
 }