diff --git a/sonnet.spec b/sonnet.spec
index 1bb6b37..012ff8e 100644
--- a/sonnet.spec
+++ b/sonnet.spec
@@ -18,15 +18,18 @@
 
 %bcond_without lang
 %define sonum   5
-%define _tar_path 5.33
 Name:           sonnet
 Version:        5.33.0
 Release:        0
+# Full KF5 version (e.g. 5.33.0)
+%{!?_kf5_version: %global _kf5_version %{version}}
+# Last major and minor KF5 version (e.g. 5.33)
+%{!?_kf5_bugfix_version: %global _kf5_bugfix_version %(echo %{_kf5_version} | awk -F. '{print $1"."$2}')}
 #BuildRequires:  aspell-devel
 BuildRequires:  cmake >= 3.0
 # Enchant plugin is currently disabled upstream
 #BuildRequires:  enchant-devel
-BuildRequires:  extra-cmake-modules >= %{_tar_path}
+BuildRequires:  extra-cmake-modules >= %{_kf5_bugfix_version}
 BuildRequires:  fdupes
 BuildRequires:  kf5-filesystem
 %if %{with lang}
@@ -41,7 +44,7 @@ Summary:        KDE spell checking library
 License:        LGPL-2.1+
 Group:          System/GUI/KDE
 Url:            http://www.kde.org
-Source:         http://download.kde.org/stable/frameworks/%{_tar_path}/%{name}-%{version}.tar.xz
+Source:         http://download.kde.org/stable/frameworks/%{_kf5_bugfix_version}/%{name}-%{version}.tar.xz
 Source1:        baselibs.conf
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build