diff --git a/meson.build b/meson.build
index 05f77ce..b95b5c0 100644
--- a/meson.build
+++ b/meson.build
@@ -1,6 +1,6 @@
 project('tio', 'c',
     version : '3.9',
-    license : [ 'GPL-2'],
+    license : 'GPL-2.0-or-later',
     meson_version : '>= 0.53.2',
     default_options : [ 'warning_level=2', 'buildtype=release', 'c_std=gnu99' ]
 )