diff --git a/com.librumreader.librum.metainfo.xml b/com.librumreader.librum.metainfo.xml
index 94f9a2315..2b994427e 100644
--- a/com.librumreader.librum.metainfo.xml
+++ b/com.librumreader.librum.metainfo.xml
@@ -50,6 +50,6 @@
     </screenshot>
   </screenshots>
 
-  <content_rating/>
+  <content_rating type="oars-1.1" />
 
 </component>