diff --git a/src/config.rs b/src/config.rs
index bf66513..097fad3 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -83,8 +83,7 @@ impl TinyEncryptConfig {
     }
 
     pub fn find_by_kid(&self, kid: &str) -> Option<&TinyEncryptConfigEnvelop> {
-        let config_envelops = self.find_by_kid_or_filter(kid, |_| false);
-        config_envelops.first().map(|e| *e)
+        self.find_by_kid_or_filter(kid, |_| false).first().copied()
     }
 
     pub fn find_by_kid_or_type(&self, k_filter: &str) -> Vec<&TinyEncryptConfigEnvelop> {