diff --git a/libtor/src/lib.rs b/libtor/src/lib.rs
index 0472239..a5cde9b 100644
--- a/libtor/src/lib.rs
+++ b/libtor/src/lib.rs
@@ -137,13 +137,11 @@ fn log_expand(flag: &TorFlag) -> Vec<String> {
                 concat_str = format!("[{}]", concat_str);
             }
 
-            format!("{}{:?}", concat_str, level).to_lowercase()
+            format!("{}{:?}", concat_str, level)
         })
         .collect::<Vec<String>>()
         .join(" ");
-    let dest_str = dest
-        .map(|d| format!(" {}", d).to_lowercase())
-        .unwrap_or_default();
+    let dest_str = dest.map(|d| format!(" {}", d)).unwrap_or_default();
 
     vec!["Log".into(), format!("{}{}", levels_str, dest_str)]
 }