diff --git a/plotutils.spec b/plotutils.spec
index 5509f36..fdd8d2e 100644
--- a/plotutils.spec
+++ b/plotutils.spec
@@ -19,7 +19,7 @@
 
 Name:           plotutils
 BuildRequires:  bison flex gcc-c++ libpng-devel libtool xorg-x11-devel zlib-devel
-License:        GPLv2+ ; GPLv3+
+License:        GPL-2.0+ ; GPL-3.0+
 Url:            http://www.gnu.org/software/plotutils/plotutils.html
 Group:          Productivity/Graphics/Visualization/Graph
 PreReq:         %install_info_prereq %suseconfig_fonts_prereq
@@ -54,7 +54,7 @@ Authors:
     James J. Clark <jjc@jclark.com>
 
 %package devel
-License:        GPLv2+ ; GPLv3+
+License:        GPL-2.0+ ; GPL-3.0+
 Summary:        GNU Plotting Utilities
 Group:          Development/Libraries/C and C++
 Requires:       %{name} = %{version} libstdc++-devel xorg-x11-libX11-devel
@@ -80,7 +80,7 @@ Authors:
     James J. Clark <jjc@jclark.com>
 
 %package -n libplot2
-License:        GPLv2+ ; GPLv3+
+License:        GPL-2.0+ ; GPL-3.0+
 Summary:        GNU Plotting Utilities
 Group:          System/Libraries
 
@@ -104,7 +104,7 @@ Authors:
     James J. Clark <jjc@jclark.com>
 
 %package -n libplotter2
-License:        GPLv2+ ; GPLv3+
+License:        GPL-2.0+ ; GPL-3.0+
 Summary:        GNU Plotting Utilities
 Group:          System/Libraries
 
@@ -128,7 +128,7 @@ Authors:
     James J. Clark <jjc@jclark.com>
 
 %package -n libxmi0
-License:        GPLv2+ ; GPLv3+
+License:        GPL-2.0+ ; GPL-3.0+
 Summary:        GNU Plotting Utilities
 Group:          System/Libraries