diff --git a/main.nf b/main.nf
index 93beb95..9f701d4 100755
--- a/main.nf
+++ b/main.nf
@@ -14,7 +14,6 @@ include { VARIANT_ANNOTATION; VARIANT_SARSCOV2_ANNOTATION;
 include { PANGOLIN_LINEAGE; VCF2FASTA } from './modules/07_lineage_annotation'
 include { BGZIP } from './modules/08_compress_vcf'
 
-
 params.help= false
 
 params.fastq1 = false
diff --git a/modules/04_variant_calling.nf b/modules/04_variant_calling.nf
index b6c8fc0..2e92924 100644
--- a/modules/04_variant_calling.nf
+++ b/modules/04_variant_calling.nf
@@ -75,7 +75,7 @@ process VARIANT_CALLING_LOFREQ {
     --min-mq ${params.min_mapping_quality} \
     --ref ${reference} \
     --call-indels \
-    <( lofreq indelqual --dindel --ref ${reference} ${bam} ) | bgzip > ${name}.lofreq.vcf.gz
+    <( lofreq indelqual --dindel --ref ${reference} ${bam} ) | bcftools sort | bgzip > ${name}.lofreq.vcf.gz
 
     # NOTE: adding the tabix index is a dirty fix to deal with LoFreq VCF missing the chromosome in the header
     bcftools index ${name}.lofreq.vcf.gz
diff --git a/nextflow.config b/nextflow.config
index cba16a1..ae09152 100755
--- a/nextflow.config
+++ b/nextflow.config
@@ -62,7 +62,7 @@ process.shell = ['/bin/bash', '-euo', 'pipefail']
 cleanup = true
 conda.createTimeout = '1 h'
 
-VERSION = '0.17.0'
+VERSION = '0.17.1'
 
 manifest {
   name = 'TRON-Bioinformatics/covigator-ngs-pipeline'