diff --git a/fedora.conf b/fedora.conf
index 71b7214..8c25094 100644
--- a/fedora.conf
+++ b/fedora.conf
@@ -773,7 +773,9 @@ ostree_installer = [
                 "ostree_install_ref=fedora/rawhide/x86_64/silverblue",
                 "ostree_update_ref=fedora/rawhide/x86_64/silverblue",
                 "flatpak_remote_name=fedora",
-                "flatpak_remote_url=oci+https://registry.fedoraproject.org",
+                # using registry-no-cdn avoids redirects to the CDN;
+                # needed because of network restrictions on koji runroot
+                "flatpak_remote_url=oci+https://registry-no-cdn.fedoraproject.org",
                 "flatpak_remote_refs=runtime/org.fedoraproject.Platform/x86_64/f30 app/org.gnome.Baobab/x86_64/stable app/org.gnome.Calculator/x86_64/stable app/org.gnome.Calendar/x86_64/stable app/org.gnome.Characters/x86_64/stable app/org.gnome.Clocks/x86_64/stable app/org.gnome.Contacts/x86_64/stable app/org.gnome.eog/x86_64/stable app/org.gnome.evince/x86_64/stable app/org.gnome.font-viewer/x86_64/stable app/org.gnome.gedit/x86_64/stable app/org.gnome.Logs/x86_64/stable app/org.gnome.Maps/x86_64/stable app/org.gnome.Screenshot/x86_64/stable app/org.gnome.Weather/x86_64/stable",
             ],
             'template_repo': 'https://pagure.io/fedora-lorax-templates.git',
@@ -797,7 +799,9 @@ ostree_installer = [
                 "ostree_install_ref=fedora/rawhide/ppc64le/silverblue",
                 "ostree_update_ref=fedora/rawhide/ppc64le/silverblue",
                 "flatpak_remote_name=fedora",
-                "flatpak_remote_url=oci+https://registry.fedoraproject.org",
+                # using registry-no-cdn avoids redirects to the CDN;
+                # needed because of network restrictions on koji runroot
+                "flatpak_remote_url=oci+https://registry-no-cdn.fedoraproject.org",
                 "flatpak_remote_refs=",
             ],
             'template_repo': 'https://pagure.io/fedora-lorax-templates.git',
@@ -821,7 +825,9 @@ ostree_installer = [
                 "ostree_install_ref=fedora/rawhide/aarch64/silverblue",
                 "ostree_update_ref=fedora/rawhide/aarch64/silverblue",
                 "flatpak_remote_name=fedora",
-                "flatpak_remote_url=oci+https://registry.fedoraproject.org",
+                # using registry-no-cdn avoids redirects to the CDN;
+                # needed because of network restrictions on koji runroot
+                "flatpak_remote_url=oci+https://registry-no-cdn.fedoraproject.org",
                 "flatpak_remote_refs=",
             ],
             'template_repo': 'https://pagure.io/fedora-lorax-templates.git',