diff --git a/recipes/mapping/bowtie2/Singularity.bowtie2-241cv1 b/recipes/mapping/bowtie2/Singularity.bowtie2-241cv1
index 71bebf47885c86955456560947321137f20e2ba2..25e57fd5193f675b9be5d905a40e70c44193f23f 100644
--- a/recipes/mapping/bowtie2/Singularity.bowtie2-241cv1
+++ b/recipes/mapping/bowtie2/Singularity.bowtie2-241cv1
@@ -10,3 +10,4 @@ From: biocontainers/bowtie2:v2.4.1_cv1
 
 %labels
     Author Nicolas Descostes
+
diff --git a/recipes/mapping/bowtie2/Singularity.bowtie2-245 b/recipes/mapping/bowtie2/Singularity.bowtie2-245
index 8b9822a8605f0a4ed98b10ee4e37903c2937f264..9af333168257ccc16cdf2aeaed33cea60a675e59 100644
--- a/recipes/mapping/bowtie2/Singularity.bowtie2-245
+++ b/recipes/mapping/bowtie2/Singularity.bowtie2-245
@@ -10,3 +10,4 @@ From: quay.io/biocontainers/bowtie2:2.4.5--py36hfca12d5_2
 
 %labels
     Author Nicolas Descostes
+