diff --git a/nextflow.config b/nextflow.config
index 6d59619..2c7d3b2 100644
--- a/nextflow.config
+++ b/nextflow.config
@@ -20,7 +20,7 @@ params {
     fastq_input_long = 'NO_FILE'
     filtlong_min_length = 1000
     filtlong_keep_percent = 90
-    chromosome_length = 5000000
+    chromosome_length = 1000000
     samplesheet_input = 'NO_FILE'
     versioned_outdir = false
     collect_outputs = false