diff --git a/lib/sdk/src/filetype/strings.rs b/lib/sdk/src/filetype/strings.rs
index dc48e0b..c921248 100644
--- a/lib/sdk/src/filetype/strings.rs
+++ b/lib/sdk/src/filetype/strings.rs
@@ -21,7 +21,7 @@ impl Language {
     where
         S: serde::Serializer,
     {
-        ser.serialize_str(&format!("lang_{}", field))
+        ser.serialize_str(&format!("lang_{field}"))
     }
 }