diff --git a/navi/dr_transform/src/util.rs b/navi/dr_transform/src/util.rs
index 83b99805a..f64544883 100644
--- a/navi/dr_transform/src/util.rs
+++ b/navi/dr_transform/src/util.rs
@@ -1,3 +1,4 @@
+use log::{debug, error};
 use npyz::WriterBuilder;
 use npyz::{AutoSerialize, WriteOptions};
 use std::io::BufWriter;
@@ -13,10 +14,10 @@ pub fn load_batch_prediction_request_base64(file_name: &str) -> Vec<Vec<u8>> {
         line_count += 1;
         match base64::decode(line.unwrap().trim()) {
             Ok(payload) => result.push(payload),
-            Err(err) => println!("error decoding line {file_name}:{line_count} - {err}"),
+            Err(err) => error!("error decoding line {file_name}:{line_count} - {err}"),
         }
     }
-    println!("result len: {}", result.len());
+    debug!("result len: {}", result.len());
     result
 }