diff --git a/icingaweb2.spec b/icingaweb2.spec
index 6282764..673f6db 100644
--- a/icingaweb2.spec
+++ b/icingaweb2.spec
@@ -18,9 +18,6 @@ Packager:       Icinga GmbH <info@icinga.com>
 %if 0%{?rhel} == 7
 %define php_scl         rh-php73
 %endif
-%if 0%{?rhel} == 6
-%define php_scl         rh-php70
-%endif
 
 %if 0%{?el5}%{?el6}%{?amzn}
 %define use_selinux 0
@@ -50,7 +47,10 @@ Requires:               %{php}-ldap
 %endif
 
 # minimum required PHP version
-%define php_version 5.6.0
+%define php_version 7.2
+
+# maximum supported PHP version
+%define php_max_version 8.1
 
 %if 0%{?suse_version}
 %define wwwconfigdir    %{_sysconfdir}/apache2/conf.d
@@ -59,10 +59,6 @@ Requires:               %{php}-ldap
 %define php_runtime     mod_php_any
 %define php_common      %{php}
 %define php_cli         %{php}
-# conflict with older PHP on SLES and openSUSE
-Conflicts:              php < %{php_version}
-Conflicts:              php5 < %{php_version}
-Conflicts:              php53
 %endif
 
 %{?amzn:Requires(pre):          shadow-utils}
@@ -72,6 +68,7 @@ Conflicts:              php53
 
 Requires:                       %{php_runtime} >= %{php_version}
 Requires:                       %{php_common} >= %{php_version}
+Conflicts:                      %{php_runtime} > %{php_max_version}
 %if 0%{?suse_version}
 Requires:                       apache2
 %endif
@@ -148,12 +145,6 @@ Requires:                   icinga-php-library >= 0.8.0-1
 Requires:                   icinga-php-thirdparty >= 0.10.0-1
 Requires:                   bash-completion
 Requires:                   %{php_cli} >= %{php_version}
-%if 0%{?suse_version}
-# conflict with older PHP on SLES and openSUSE
-Conflicts:                  php < %{php_version}
-Conflicts:                  php5 < %{php_version}
-Conflicts:                  php53
-%endif
 
 
 %description -n icingacli