diff --git a/Cargo.toml b/Cargo.toml
index 61e272e9c..523b90805 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -269,11 +269,11 @@ tx = [
 ]
 
 util = [
+    "tinyjson",
     "tracing-subscriber",
     "tracing-appender",
     "nu-ansi-term",
-
-    "tinyjson",
+    "smol",
 
     "darkfi-serial",
 ]
diff --git a/src/util/logger.rs b/src/util/logger.rs
index 329c207a7..a58d2c5dd 100644
--- a/src/util/logger.rs
+++ b/src/util/logger.rs
@@ -227,9 +227,9 @@ where
                     let span_id = span.id().into_u64().to_string();
                     let span_id = &span_id[..span_id.len().min(6)];
 
-                    write!(writer, "{}({})", span_name, span_id)?;
+                    write!(writer, "{span_name}({span_id})")?;
                 } else {
-                    write!(writer, "{}", span_name)?;
+                    write!(writer, "{span_name}")?;
                 }
                 seen = true;