diff --git a/modules/local/kraken2_standard_report.nf b/modules/local/kraken2_standard_report.nf
index fcd2c32..8fa2521 100644
--- a/modules/local/kraken2_standard_report.nf
+++ b/modules/local/kraken2_standard_report.nf
@@ -5,7 +5,7 @@ process KRAKEN2_STANDARD_REPORT {
     conda "conda-forge::sed=4.7"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
         'https://depot.galaxyproject.org/singularity/ubuntu:20.04' :
-        'ubuntu:20.04' }"
+        'docker.io/ubuntu:20.04' }"
 
     input:
     tuple val(meta), path(report)
diff --git a/modules/local/krona_cleanup.nf b/modules/local/krona_cleanup.nf
index 082c22b..4b33b73 100644
--- a/modules/local/krona_cleanup.nf
+++ b/modules/local/krona_cleanup.nf
@@ -5,7 +5,7 @@ process KRONA_CLEANUP {
     conda "conda-forge::sed=4.7"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
         'https://depot.galaxyproject.org/singularity/ubuntu:20.04' :
-        'ubuntu:20.04' }"
+        'docker.io/ubuntu:20.04' }"
 
     input:
     tuple val(meta), path(krona, stageAs: 'uncleaned.krona.txt')