diff --git a/fedora-atomic.conf b/fedora-atomic.conf
index 47cf31c..b10e74d 100644
--- a/fedora-atomic.conf
+++ b/fedora-atomic.conf
@@ -322,7 +322,7 @@ image_build = {
 ostree_installer = [
     ("^Atomic$", {
         "x86_64": {
-            "source_repo_from": "http://kojipkgs.fedoraproject.org/pub/fedora/linux/releases/25/Everything/$arch/os/",
+            "source_repo_from": "https://kojipkgs.fedoraproject.org/pub/alt/stage/25_RC-1.3/Everything/$arch/os/",
             "release": None,
             "installpkgs": ["fedora-productimg-atomic"],
             "add_template": ["atomic-installer/lorax-configure-repo.tmpl"],