diff --git a/nextflow.config b/nextflow.config
index b438f20..35bfc51 100644
--- a/nextflow.config
+++ b/nextflow.config
@@ -55,7 +55,7 @@ profiles {
         params.aligner        = "STAR" 
         params.reads          = "${baseDir}/data/chr21/chr21_small_R1.fastq.gz "
         params.genome         = "${baseDir}/data/chr21/chr21_small.fasta.gz"
-        params.annotation     = "${baseDir}/data/chr21/chr21_small_filtered.gff3"
+        params.annotation     = "${baseDir}/data/chr21/chr21_small_filtered.gff3.gz"
         params.library_type   = "ISR" 
         params.read_type      = "short_single"
     }
@@ -64,7 +64,7 @@ profiles {
         params.aligner        = "STAR" 
         params.reads          = "${baseDir}/data/chr21/"
         params.genome         = "${baseDir}/data/chr21/chr21_small.fasta.gz" 
-        params.annotation     = "${baseDir}/data/chr21/chr21_small_filtered.gff3"
+        params.annotation     = "${baseDir}/data/chr21/chr21_small_filtered.gff3.gz"
         params.library_type   = "ISR" 
         params.read_type      = "short_paired"
     }