diff --git a/conf/pipeline/sarek/munin.config b/conf/pipeline/sarek/munin.config
index d22e5e9..039d117 100644
--- a/conf/pipeline/sarek/munin.config
+++ b/conf/pipeline/sarek/munin.config
@@ -16,7 +16,7 @@ params {
   pon_index         = '/data1/PON/vcfs/BTB.PON.vcf.gz.tbi'
   snpeff_cache      = '/data1/cache/snpEff/'
   vep_cache         = '/data1/cache/VEP/'
-  vep_cache_version = 95
+  vep_cache_version = '95'
 }
 
 // Specific nf-core/sarek process configuration