diff --git a/modules/snapaligner/align/main.nf b/modules/snapaligner/align/main.nf
index 2eee479f..4c8cd629 100644
--- a/modules/snapaligner/align/main.nf
+++ b/modules/snapaligner/align/main.nf
@@ -1,5 +1,5 @@
 process SNAPALIGNER_ALIGN {
-    tag '$meta.id'
+    tag "$meta.id"
     label 'process_high'
 
     conda (params.enable_conda ? "bioconda::snap-aligner=2.0.1" : null)
diff --git a/modules/snapaligner/index/main.nf b/modules/snapaligner/index/main.nf
index 6dc2c958..d084d841 100644
--- a/modules/snapaligner/index/main.nf
+++ b/modules/snapaligner/index/main.nf
@@ -1,5 +1,5 @@
 process SNAPALIGNER_INDEX {
-    tag '$fasta'
+    tag "$fasta"
     label 'process_high'
 
     conda (params.enable_conda ? "bioconda::snap-aligner=2.0.1" : null)