diff --git a/Jenkinsfile-eval b/Jenkinsfile-eval
index 670b827..fe63c8b 100644
--- a/Jenkinsfile-eval
+++ b/Jenkinsfile-eval
@@ -82,6 +82,6 @@ node {
     stage('Saving artefacts') {
         echo 'Goodbye!'
         sh 'ls'
-        archiveArtifacts artifacts: '*.csv', '*.png' 
+        archiveArtifacts artifacts: '*.csv, *.png' 
     }
 }
\ No newline at end of file
diff --git a/src/models/utils.py b/src/models/utils.py
index 3ffa84c..c388f1e 100644
--- a/src/models/utils.py
+++ b/src/models/utils.py
@@ -38,7 +38,7 @@ class utils:
         file_path = Path(file_path)
 
         df = pd.DataFrame({"build_id": [build_id], "data": [data]})
-        df.to_csv(file_path, mode="w", header=False, index=False)
+        df.to_csv(file_path, mode="a", header=False, index=False)
 
 
 if __name__ == "__main__":