diff --git a/procps.spec b/procps.spec
index f89594d..bbe9029 100644
--- a/procps.spec
+++ b/procps.spec
@@ -35,11 +35,13 @@ BuildRequires:  pkg-config
 BuildRequires:  pkgconfig(systemd)
 %endif
 BuildRequires:  xz
-PreReq:         %fillup_prereq %insserv_prereq
-Provides:       ps = %version-%release
-Obsoletes:      ps < %version-%release
 Version:        3.3.8
 Release:        0
+Provides:       ps = %version-%release
+Obsoletes:      ps < %version-%release
+Requires(post): %fillup_prereq
+Requires(post): %insserv_prereq
+Requires(postun): %insserv_prereq
 Summary:        The ps utilities for /proc
 License:        GPL-2.0+ and LGPL-2.1+
 Group:          System/Monitoring
@@ -103,6 +105,8 @@ to develop applications that require these.
 Summary:        The props library
 License:        LGPL-2.1+
 Group:          System/Libraries
+Requires(post): /sbin/ldconfig
+Requires(postun): /sbin/ldconfig
 
 %description -n %{libname}
 The props library can be used to read informations out from /proc