diff --git a/openldap.spec b/openldap.spec
index 8ac6782..1a02203 100644
--- a/openldap.spec
+++ b/openldap.spec
@@ -42,7 +42,7 @@ Patch200: openldap-evolution-ntlm.patch
 
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
-BuildRequires: cyrus-sasl-devel >= 2.1, nss-devel, krb5-devel, tcp_wrappers-devel, unixODBC-devel
+BuildRequires: cyrus-sasl-devel, nss-devel, krb5-devel, tcp_wrappers-devel, unixODBC-devel
 BuildRequires: glibc-devel, libtool, libtool-ltdl-devel, groff, perl
 # smbk5pwd overlay:
 BuildRequires: openssl-devel
@@ -59,8 +59,8 @@ libraries, and documentation for OpenLDAP.
 %package devel
 Summary: LDAP development libraries and header files
 Group: Development/Libraries
-Requires: openldap = %{version}-%{release}, cyrus-sasl-devel >= 2.1
-Provides: openldap-evolution-devel = %{version}-%{release}
+Requires: openldap%{?_isa} = %{version}-%{release}, cyrus-sasl-devel%{?_isa}
+Provides: openldap-evolution-devel%{?_isa} = %{version}-%{release}
 
 %description devel
 The openldap-devel package includes the development libraries and
@@ -73,12 +73,12 @@ customized LDAP clients.
 %package servers
 Summary: LDAP server
 License: OpenLDAP
-Requires: openldap = %{version}-%{release}, libdb-utils, openssl
+Requires: openldap%{?_isa} = %{version}-%{release}, libdb-utils, nss-utils
 Requires(pre): shadow-utils
 Requires(post): systemd-units, systemd-sysv, chkconfig
 Requires(preun): systemd-units
 Requires(postun): systemd-units
-BuildRequires: libdb-devel >= 5.0, libdb-devel < 5.3
+BuildRequires: libdb-devel%{?_isa}
 BuildRequires: systemd-units
 Group: System Environment/Daemons
 
@@ -92,7 +92,7 @@ over the Internet. This package contains the slapd server and related files.
 
 %package servers-sql
 Summary: SQL support module for OpenLDAP server
-Requires: openldap-servers = %{version}-%{release}
+Requires: openldap-servers%{?_isa} = %{version}-%{release}
 Group: System Environment/Daemons
 
 %description servers-sql
@@ -106,7 +106,7 @@ slapd server can use to read data from an RDBMS.
 
 %package clients
 Summary: LDAP client utilities
-Requires: openldap = %{version}-%{release}
+Requires: openldap%{?_isa} = %{version}-%{release}
 Group: Applications/Internet
 
 %description clients