diff --git a/conf/public_aws_ecr.config b/conf/public_aws_ecr.config
index 0f4a7163..2f98603a 100644
--- a/conf/public_aws_ecr.config
+++ b/conf/public_aws_ecr.config
@@ -8,8 +8,9 @@
 ----------------------------------------------------------------------------------------
 */
 
-docker.registry = 'public.ecr.aws'
-podman.registry = 'public.ecr.aws'
+docker.registry      = 'public.ecr.aws'
+podman.registry      = 'public.ecr.aws'
+singularity.registry = 'public.ecr.aws'
 
 process {
     withName: 'CELLRANGER_COUNT' {