diff --git a/crates/oxidetalis/src/extensions.rs b/crates/oxidetalis/src/extensions.rs
index ad91c2d..9e6b2e0 100644
--- a/crates/oxidetalis/src/extensions.rs
+++ b/crates/oxidetalis/src/extensions.rs
@@ -30,7 +30,7 @@ pub trait DepotExt {
     /// Returns the server configuration
     fn config(&self) -> &Config;
     /// Retutns the nonce cache
-    fn nonce_cache(&self) -> &NonceCache;
+    fn nonce_cache(&self) -> Arc<NonceCache>;
     /// Returns the size of the nonce cache
     fn nonce_cache_size(&self) -> &usize;
 }
@@ -52,9 +52,11 @@ impl DepotExt for Depot {
         self.obtain::<Arc<Config>>().expect("Config not found")
     }
 
-    fn nonce_cache(&self) -> &NonceCache {
-        self.obtain::<Arc<NonceCache>>()
-            .expect("Nonce cache not found")
+    fn nonce_cache(&self) -> Arc<NonceCache> {
+        Arc::clone(
+            self.obtain::<Arc<NonceCache>>()
+                .expect("Nonce cache not found"),
+        )
     }
 
     fn nonce_cache_size(&self) -> &usize {
diff --git a/crates/oxidetalis/src/middlewares/signature.rs b/crates/oxidetalis/src/middlewares/signature.rs
index b75dfbe..5dff94b 100644
--- a/crates/oxidetalis/src/middlewares/signature.rs
+++ b/crates/oxidetalis/src/middlewares/signature.rs
@@ -72,7 +72,7 @@ pub async fn signature_check(
         }
     };
 
-    if !utils::is_valid_nonce(&signature, depot.nonce_cache(), depot.nonce_cache_size())
+    if !utils::is_valid_nonce(&signature, &depot.nonce_cache(), depot.nonce_cache_size())
         || !utils::is_valid_signature(
             &sender_public_key,
             &depot.config().server.private_key,