diff --git a/conf/modules.config b/conf/modules.config
index 3f1fec1..6ee473f 100644
--- a/conf/modules.config
+++ b/conf/modules.config
@@ -74,7 +74,7 @@ process {
         ext.args   = [
                     genome_reference != 'grch37' & genome_reference != 'grch38' ? "--genome_reference '${genome_reference}'" : '',
                     genome_reference == 'grch37'                                ? "--genome_reference 'https://grch37.ensembl.org/'" : '',
-                    genome_reference == 'grch38'                                ? "--genome_reference 'https://ensembl.org/'" : '',
+                    genome_reference == 'grch38'                                ? "--genome_reference 'https://www.ensembl.org'" : '',
                     '--peptides'
         ].join(' ').trim()
         publishDir = [
@@ -88,7 +88,7 @@ process {
         ext.args   = [
                     genome_reference != 'grch37' & genome_reference != 'grch38' ? "--genome_reference '${genome_reference}'" : '',
                     genome_reference == 'grch37'                                ? "--genome_reference 'https://grch37.ensembl.org/'" : '',
-                    genome_reference == 'grch38'                                ? "--genome_reference 'https://ensembl.org/'" : '',
+                    genome_reference == 'grch38'                                ? "--genome_reference 'https://www.ensembl.org'" : '',
                     '--peptides'
         ].join(' ').trim()
         publishDir = [
@@ -102,7 +102,7 @@ process {
         ext.args   = [
                     genome_reference != 'grch37' & genome_reference != 'grch38' ? "--genome_reference '${genome_reference}'" : '',
                     genome_reference == 'grch37'                                ? "--genome_reference 'https://grch37.ensembl.org/'" : '',
-                    genome_reference == 'grch38'                                ? "--genome_reference 'https://ensembl.org/'" : '',
+                    genome_reference == 'grch38'                                ? "--genome_reference 'https://www.ensembl.org'" : '',
                     '--somatic_mutation'
         ].join(' ').trim()
         publishDir = [