diff --git a/src/nf_modules/minimap2/main.nf b/src/nf_modules/minimap2/main.nf
index 91c91931b131b820a327686623a614cd26b4ab7a..2ce7d8ca37748ddf2441a8349fbc3fbca1153212 100755
--- a/src/nf_modules/minimap2/main.nf
+++ b/src/nf_modules/minimap2/main.nf
@@ -85,7 +85,7 @@ process hbv_transcriptome {
   """
 }
 
-params.mapping_hbv_genome = "-ax splice --secondary=no -G 1650 -u n --eqx"
+params.mapping_hbv_genome = "-ax splice --secondary=no -u n --splice-flank=no --eqx"
 process hbv_genome {
   container = "${container_url}"
   label "big_mem_multi_cpus"