diff --git a/nextflow.config b/nextflow.config
index bd17146067..d92c6929f5 100644
--- a/nextflow.config
+++ b/nextflow.config
@@ -52,7 +52,7 @@ params {
   cf_coeff = 0.05                    // default value for Control-FREEC
   cf_contamination = null            // by default not specified in Control-FREEC
   cf_contamination_adjustment = null // by default we are not using this in Control-FREEC
-  cf_ploidy = "2"                    // you can use 2,3,4
+  cf_ploidy = 2                      // you can use 2,3,4
   cf_window = null                   // by default we are not using this in Control-FREEC
   generate_gvcf = null // g.vcf are not produced by HaplotypeCaller by default
   no_strelka_bp = null // Strelka will use Manta candidateSmallIndels if available