diff --git a/neurodocker/templates/_default.yaml b/neurodocker/templates/_default.yaml
index 689fe9dd..d3debba1 100644
--- a/neurodocker/templates/_default.yaml
+++ b/neurodocker/templates/_default.yaml
@@ -31,9 +31,8 @@ source:
         export ND_ENTRYPOINT="{{ self.env['ND_ENTRYPOINT'] }}"
         {%- if self.pkg_manager == "yum" %}
         if ls /etc/yum.repos.d/CentOS-* >/dev/null 2>&1; then
-            # Disable mirrorlist and switch to vault.centos.org
             sed -i 's/mirrorlist/#mirrorlist/g' /etc/yum.repos.d/CentOS-*
-            sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*
+            sed -i 's|#baseurl=http://mirror.centos.org|baseurl=http://vault.centos.org|g' /etc/yum.repos.d/CentOS-*;
         fi
         {%- endif %}
         {{ self.install_dependencies() }}