diff --git a/nextflow.config b/nextflow.config
index dd65672..9dd6691 100644
--- a/nextflow.config
+++ b/nextflow.config
@@ -74,14 +74,15 @@ params {
 }
 
 // runinfo
+def trace_timestamp = new java.util.Date().format( 'yyyy-MM-dd_HH-mm-ss')
 timeline {
   enabled = true
-  file = "${params.output}/${params.runinfodir}/execution_timeline.html"
+  file = "${params.output}/${params.runinfodir}/execution_timeline_${trace_timestamp}.html"
 }
 
 report {
   enabled = true
-  file = "${params.output}/${params.runinfodir}/execution_report.html"
+  file = "${params.output}/${params.runinfodir}/execution_report_${trace_timestamp}.html"
 }