diff --git a/nextflow.config b/nextflow.config
index f64be72..fa22833 100755
--- a/nextflow.config
+++ b/nextflow.config
@@ -8,7 +8,7 @@ params {
   filter            = false
   tfkmers_threshold = 0.2
   bambu_threshold   = 0.2
-  operation         = "union"
+  operation         = "intersection"
   tfkmers_model     = null
   tfkmers_tokenizer = null
 }