diff --git a/data/library.ttl b/data/library.ttl
index bc0cfae..3714192 100644
--- a/data/library.ttl
+++ b/data/library.ttl
@@ -4532,13 +4532,13 @@ prefix license: <dokk:license:>
 
 :vulkan_tutorial_04-2023_Overvoorde
     :title "Vulkan Tutorial" ;
-    :license license:CC-BY-SA-4.0 license:CC0-1.0 ;
+    :license license:CC-BY-SA-4.0 , license:CC0-1.0 ;
     :author "Alexander Overvoorde" ;
     :site "https://github.com/Overv/VulkanTutorial" .
 
 :vulkan_tutorial_04-2023_fr_Overvoorde
     :title "Vulkan Tutorial" ;
-    :license license:CC-BY-SA-4.0 license:CC0-1.0 ;
+    :license license:CC-BY-SA-4.0 , license:CC0-1.0 ;
     :author "Alexander Overvoorde" ;
     :site "https://github.com/Overv/VulkanTutorial" ;
     :translation_of :vulkan_tutorial_04-2023_Overvoorde ;