diff --git a/subworkflows/nf-core/align_bowtie2/main.nf b/subworkflows/nf-core/align_bowtie2/main.nf
index ec453f8d..eb847aac 100644
--- a/subworkflows/nf-core/align_bowtie2/main.nf
+++ b/subworkflows/nf-core/align_bowtie2/main.nf
@@ -2,6 +2,8 @@
 // Alignment with Bowtie2
 //
 
+nextflow.enable.dsl = 2
+
 params.align_options          = [:]
 params.samtools_sort_options  = [:]
 params.samtools_index_options = [:]