diff --git a/src/seqtk/seqtk_subseq/config.vsh.yaml b/src/seqtk/seqtk_subseq/config.vsh.yaml
index 48059436..1c2e8c08 100644
--- a/src/seqtk/seqtk_subseq/config.vsh.yaml
+++ b/src/seqtk/seqtk_subseq/config.vsh.yaml
@@ -53,7 +53,8 @@ argument_groups:
       - name: "--sequence_line_length"
         alternatives: -l
         type: integer
-        description: Sequence line length of input fasta file. Default: 0.
+        description: | 
+          Sequence line length of input fasta file. Default: 0.
         example: 0