diff --git a/config/config.yaml b/config/config.yaml
index 6140d4988596a6c2293e96a623ca610817fc7a2a..a3db8b99d7cd18895fbde9b419900ea44062283b 100644
--- a/config/config.yaml
+++ b/config/config.yaml
@@ -108,7 +108,7 @@ adapters:
     cutadapt_file: file:config/TruSeq_Stranded_RNA.fa
     alien_file: config/TruSeq_Stranded_RNA.fa
     m: 25
-    mode: a
+    mode: b
     options: -O 6 --trim-n --max-n 1 # for cutadapt
     #options: -k 10 -m 5 -p 80  # for alienTrimmer
     quality: 30
@@ -144,7 +144,7 @@ bowtie2_mapping:
 star_mapping:
     do: yes
     # for small genome, STAR may abort with segmentation fault. Setting sjdb Over hang to 250 skips this issue
-    options: "--outFilterMismatchNoverLmax 0.05 --outSAMunmapped Within --sjdbOverhang 250"
+    options: "--outSAMunmapped None "
     threads: 4