diff --git a/Dockerfile b/Dockerfile
index 8042541f..eba205a2 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -31,7 +31,7 @@ ARG MYUNAME=builder
 ARG MYUID=1000
 # CentOS & EPEL URLs that match the base image
 # Override these with --build-arg if you have a mirror
-ARG CENTOS_7_8_URL=http://vault.centos.org/centos/7.8.2003
+ARG CENTOS_7_8_URL=https://vault.centos.org/centos/7.8.2003
 ARG EPEL_7_8_URL=https://archives.fedoraproject.org/pub/archive/epel/7.2020-04-20
 ARG MY_EMAIL=
 
diff --git a/centos-mirror-tools/dl_other_from_centos_repo.sh b/centos-mirror-tools/dl_other_from_centos_repo.sh
index caa46e9d..d16e7dc4 100755
--- a/centos-mirror-tools/dl_other_from_centos_repo.sh
+++ b/centos-mirror-tools/dl_other_from_centos_repo.sh
@@ -5,7 +5,7 @@
 #
 
 #
-# Download non-RPM files from http://vault.centos.org/7.4.1708/os/x86_64/
+# Download non-RPM files from https://vault.centos.org/7.4.1708/os/x86_64/
 #
 
 DL_OTHER_FROM_CENTOS_REPO_DIR="$(dirname "$(readlink -f "${BASH_SOURCE[0]}" )" )"
diff --git a/centos-mirror-tools/utils_tests.sh b/centos-mirror-tools/utils_tests.sh
index 8a7da11d..1ffab382 100644
--- a/centos-mirror-tools/utils_tests.sh
+++ b/centos-mirror-tools/utils_tests.sh
@@ -40,7 +40,7 @@ check_result "$res" "$expect"
 # get_url
 
 res=$(get_url "acpid-2.0.19-9.el7.x86_64.rpm" "L1")
-expect="http://vault.centos.org/centos/7.4.1708/cr/x86_64/Packages/acpid-2.0.19-9.el7.x86_64.rpm"
+expect="https://vault.centos.org/centos/7.4.1708/cr/x86_64/Packages/acpid-2.0.19-9.el7.x86_64.rpm"
 check_result "$res" "$expect"
 
 res=$(get_url "python2-httpbin-0.5.0-6.el7.noarch.rpm#http://cbs.centos.org/kojifiles/packages/python-httpbin/0.5.0/6.el7/noarch/python2-httpbin-0.5.0-6.el7.noarch.rpm" "L1")