diff --git a/workflow/rna-seq.nf b/workflow/rna-seq.nf
index 0e406aa2a7ca7096d64a3b96424b67d447166f7c..531447b75249eca61cf5661e515a586fcc65913f 100755
--- a/workflow/rna-seq.nf
+++ b/workflow/rna-seq.nf
@@ -117,7 +117,7 @@ process parseMetadata {
     ulimit -a >>${repRID_parseMetadata}.parseMetadata.err
 
     # Check replicate RID metadata
-    rep=\$(python ${baseDir}/scripts/parseMeta.py -r ${repRID_parseMetadata} -m "${fileMeta}" -p repRID)
+    rep=\$(python3 ${baseDir}/scripts/parseMeta.py -r ${repRID_parseMetadata} -m "${fileMeta}" -p repRID)
     echo "LOG: replicate RID metadata parsed: \${rep}" >>${repRID_parseMetadata}.parseMetadata.err
     
     # Get endedness metadata