diff --git a/lab6/Jenkinsfile_eval b/lab6/Jenkinsfile_eval
index 51416c5..be4bfe6 100644
--- a/lab6/Jenkinsfile_eval
+++ b/lab6/Jenkinsfile_eval
@@ -18,7 +18,7 @@ pipeline {
 					echo 'Model copied'
 					sh 'tar xvzf lego_reg_model.tar.gz'				
 					echo 'Optional copying of the metrics file from previous build...'
-					copyArtifacts filter: 'eval_results.txt', projectName: 's449288-evaluation/master/', optional: 'True'
+					copyArtifacts filter: 'eval_results.txt', projectName: 's449288-evaluation/master/', optional: true
 					echo 'Metrics file copied if it did not exist'
 					echo 'Evaluating model...'
 					sh 'python3 evaluate.py'