diff --git a/src/gui/org.kde.ksudoku.appdata.xml b/src/gui/org.kde.ksudoku.appdata.xml
--- a/src/gui/org.kde.ksudoku.appdata.xml
+++ b/src/gui/org.kde.ksudoku.appdata.xml
@@ -115,4 +115,5 @@
     </screenshot>
   </screenshots>
   <content_rating type="oars-1.1"/>
+  <project_license>GPL-2.0</project_license>
 </component>