diff --git a/etc/dnf/dnf.conf b/etc/dnf/dnf.conf
index 23986342..5ee578db 100644
--- a/etc/dnf/dnf.conf
+++ b/etc/dnf/dnf.conf
@@ -5,6 +5,10 @@ clean_requirements_on_remove=True
 best=False
 skip_if_unavailable=True
 
+# Fedora 40
+# https://fedoraproject.org/wiki/Changes/Drop_Delta_RPMs
+deltarpm=False
+
 # Explicitly enable finding the fastest mirror
 fastestmirror=true