diff --git a/milter-regex.spec b/milter-regex.spec
index c29c508..bc6bac6 100644
--- a/milter-regex.spec
+++ b/milter-regex.spec
@@ -18,6 +18,8 @@ Requires(pre): shadow-utils
 Requires(post): systemd-units
 Requires(preun): systemd-units
 Requires(postun): systemd-units
+Conflicts:     systemd < 38
+Conflicts:     filesystem < 3
 # This is actually needed for the %%triggerun script but Requires(triggerun)
 # is not valid. We can use %%post because this particular %%triggerun script
 # should fire just after this package is installed. This can be removed for