diff --git a/modules/nf-core/cat/fastq/main.nf b/modules/nf-core/cat/fastq/main.nf
index 4bdec89001f..c5359bf93f5 100644
--- a/modules/nf-core/cat/fastq/main.nf
+++ b/modules/nf-core/cat/fastq/main.nf
@@ -5,7 +5,7 @@ process CAT_FASTQ {
     conda "conda-forge::sed=4.7"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
         'https://depot.galaxyproject.org/singularity/ubuntu:20.04' :
-        'docker.io/ubuntu:20.04' }"
+        'docker.io/library/ubuntu:20.04' }"
 
     input:
     tuple val(meta), path(reads, stageAs: "input*/*")
diff --git a/modules/nf-core/custom/tabulartogseacls/main.nf b/modules/nf-core/custom/tabulartogseacls/main.nf
index 0e1d4d9638a..c117d3c6412 100644
--- a/modules/nf-core/custom/tabulartogseacls/main.nf
+++ b/modules/nf-core/custom/tabulartogseacls/main.nf
@@ -5,7 +5,7 @@ process CUSTOM_TABULARTOGSEACLS {
     conda "conda-forge::coreutils=9.1"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
         'https://depot.galaxyproject.org/singularity/ubuntu:20.04' :
-        'docker.io/ubuntu:20.04' }"
+        'docker.io/library/ubuntu:20.04' }"
 
     input:
     tuple val(meta), path(samples)
diff --git a/modules/nf-core/custom/tabulartogseagct/main.nf b/modules/nf-core/custom/tabulartogseagct/main.nf
index 62ca8eaf84a..c06816620e2 100644
--- a/modules/nf-core/custom/tabulartogseagct/main.nf
+++ b/modules/nf-core/custom/tabulartogseagct/main.nf
@@ -5,7 +5,7 @@ process CUSTOM_TABULARTOGSEAGCT {
     conda "conda-forge::coreutils=9.1"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
         'https://depot.galaxyproject.org/singularity/ubuntu:20.04' :
-        'docker.io/ubuntu:20.04' }"
+        'docker.io/library/ubuntu:20.04' }"
 
     input:
     tuple val(meta), path(tabular)
diff --git a/modules/nf-core/gnu/sort/main.nf b/modules/nf-core/gnu/sort/main.nf
index 1c1b9ede824..2f24d33e775 100644
--- a/modules/nf-core/gnu/sort/main.nf
+++ b/modules/nf-core/gnu/sort/main.nf
@@ -5,7 +5,7 @@ process GNU_SORT {
     conda "conda-forge::coreutils=9.1"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
     'https://depot.galaxyproject.org/singularity/ubuntu:20.04' :
-    'docker.io/ubuntu:20.04' }"
+    'docker.io/library/ubuntu:20.04' }"
 
     input:
     tuple val(meta), path(input)
diff --git a/modules/nf-core/gunzip/main.nf b/modules/nf-core/gunzip/main.nf
index 194dfc32263..16e2b83dc73 100644
--- a/modules/nf-core/gunzip/main.nf
+++ b/modules/nf-core/gunzip/main.nf
@@ -5,7 +5,7 @@ process GUNZIP {
     conda "conda-forge::sed=4.7"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
         'https://depot.galaxyproject.org/singularity/ubuntu:20.04' :
-        'docker.io/ubuntu:20.04' }"
+        'docker.io/library/ubuntu:20.04' }"
 
     input:
     tuple val(meta), path(archive)
diff --git a/modules/nf-core/igv/js/main.nf b/modules/nf-core/igv/js/main.nf
index 198d6bc047c..f34a67d0da1 100644
--- a/modules/nf-core/igv/js/main.nf
+++ b/modules/nf-core/igv/js/main.nf
@@ -6,7 +6,7 @@ process IGV_JS {
     conda "conda-forge::sed=4.7"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
         'https://depot.galaxyproject.org/singularity/ubuntu:20.04' :
-        'docker.io/ubuntu:20.04' }"
+        'docker.io/library/ubuntu:20.04' }"
 
     input:
     tuple val(meta), path(alignment), path(index)
diff --git a/modules/nf-core/md5sum/main.nf b/modules/nf-core/md5sum/main.nf
index e2ee9bdd0c3..a3843384df4 100644
--- a/modules/nf-core/md5sum/main.nf
+++ b/modules/nf-core/md5sum/main.nf
@@ -5,7 +5,7 @@ process MD5SUM {
     conda "conda-forge::coreutils=9.1"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
         'https://depot.galaxyproject.org/singularity/ubuntu:20.04' :
-        'docker.io/ubuntu:20.04' }"
+        'docker.io/library/ubuntu:20.04' }"
 
     input:
     tuple val(meta), path(file)
diff --git a/modules/nf-core/shasum/main.nf b/modules/nf-core/shasum/main.nf
index b38da3646ad..4f53c050e66 100644
--- a/modules/nf-core/shasum/main.nf
+++ b/modules/nf-core/shasum/main.nf
@@ -5,7 +5,7 @@ process SHASUM {
     conda "conda-forge::coreutils=9.1"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
         'https://depot.galaxyproject.org/singularity/ubuntu:20.04' :
-        'docker.io/ubuntu:20.04' }"
+        'docker.io/library/ubuntu:20.04' }"
 
     input:
     tuple val(meta), path(file)
diff --git a/modules/nf-core/untar/main.nf b/modules/nf-core/untar/main.nf
index 67f497ee8de..a4488c3595d 100644
--- a/modules/nf-core/untar/main.nf
+++ b/modules/nf-core/untar/main.nf
@@ -5,7 +5,7 @@ process UNTAR {
     conda "conda-forge::sed=4.7 bioconda::grep=3.4 conda-forge::tar=1.34"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
         'https://depot.galaxyproject.org/singularity/ubuntu:20.04' :
-        'docker.io/ubuntu:20.04' }"
+        'docker.io/library/ubuntu:20.04' }"
 
     input:
     tuple val(meta), path(archive)
diff --git a/modules/nf-core/untarfiles/main.nf b/modules/nf-core/untarfiles/main.nf
index a93e81d4481..55d483719a8 100644
--- a/modules/nf-core/untarfiles/main.nf
+++ b/modules/nf-core/untarfiles/main.nf
@@ -5,7 +5,7 @@ process UNTARFILES {
     conda "conda-forge::sed=4.7 bioconda::grep=3.4 conda-forge::tar=1.34"
     container "${ workflow.containerEngine == 'singularity' && !task.ext.singularity_pull_docker_container ?
         'https://depot.galaxyproject.org/singularity/ubuntu:20.04' :
-        'docker.io/ubuntu:20.04' }"
+        'docker.io/library/ubuntu:20.04' }"
 
     input:
     tuple val(meta), path(archive)