diff --git a/data/README.md b/data/README.md
index 829d788..5e603e5 100644
--- a/data/README.md
+++ b/data/README.md
@@ -8,10 +8,10 @@ Not all fonts listed here are actively used in the examples, but they can be fou
 
 |File name|Image|License|Source/Author|
 |---|---|---|---|
-|techno.png|![techno](fonts/techno.png)|CC0/public domain|[usr_share](https://opengameart.org/content/new-original-grafx2-font-collection)|
-|solar.png|![solar](fonts/solar.png)|CC0/public domain|[usr_share](https://opengameart.org/content/new-original-grafx2-font-collection)|
-|cursive1.png|![cursive1](fonts/cursive1.png)|CC0/public domain|[usr_share](https://opengameart.org/content/new-original-grafx2-font-collection)|
-|cursive2.png|![cursive2](fonts/cursive2.png)|CC0/public domain|[usr_share](https://opengameart.org/content/new-original-grafx2-font-collection)|
+|techno.png|![techno](fonts/techno.png)|[CC0/public domain](https://creativecommons.org/publicdomain/zero/1.0/)|[usr_share](https://opengameart.org/content/new-original-grafx2-font-collection)|
+|solar.png|![solar](fonts/solar.png)|[CC0/public domain](https://creativecommons.org/publicdomain/zero/1.0/)|[usr_share](https://opengameart.org/content/new-original-grafx2-font-collection)|
+|cursive1.png|![cursive1](fonts/cursive1.png)|[CC0/public domain](https://creativecommons.org/publicdomain/zero/1.0/)|[usr_share](https://opengameart.org/content/new-original-grafx2-font-collection)|
+|cursive2.png|![cursive2](fonts/cursive2.png)|[CC0/public domain](https://creativecommons.org/publicdomain/zero/1.0/)|[usr_share](https://opengameart.org/content/new-original-grafx2-font-collection)|
 
 ------------
 ## Assets used in examples
@@ -21,23 +21,23 @@ Not all fonts listed here are actively used in the examples, but they can be fou
 
 |File name|License|Source/Author|
 |---|---|---|
-|assets/image.slk|CC0/public domain|Captain4LK|
+|assets/image.slk|[CC0/public domain](https://creativecommons.org/publicdomain/zero/1.0/)|Captain4LK|
 
 ### Performance
 
 |File name|License|Source/Author|
 |---|---|---|
-|assets/gui_00.png|CC0/public domain|[0x72](https://0x72.itch.io/dungeonui)|
-|assets/gui_01.png|CC0/public domain|[0x72](https://0x72.itch.io/dungeonui)|
-|assets/gui_02.png|CC0/public domain|[0x72](https://0x72.itch.io/dungeontileset-ii)|
-|assets/gui_03.png|CC0/public domain|[0x72](https://0x72.itch.io/dungeontileset-ii)|
-|assets/sprites.*|CC0/public domain|[0x72](https://0x72.itch.io/pixeldudesmaker)|
+|assets/gui_00.png|[CC0/public domain](https://creativecommons.org/publicdomain/zero/1.0/)|[0x72](https://0x72.itch.io/dungeonui)|
+|assets/gui_01.png|[CC0/public domain](https://creativecommons.org/publicdomain/zero/1.0/)|[0x72](https://0x72.itch.io/dungeonui)|
+|assets/gui_02.png|[CC0/public domain](https://creativecommons.org/publicdomain/zero/1.0/)|[0x72](https://0x72.itch.io/dungeontileset-ii)|
+|assets/gui_03.png|[CC0/public domain](https://creativecommons.org/publicdomain/zero/1.0/)|[0x72](https://0x72.itch.io/dungeontileset-ii)|
+|assets/sprites.png|[CC0/public domain](https://creativecommons.org/publicdomain/zero/1.0/)|[0x72](https://0x72.itch.io/pixeldudesmaker)|
 
 ### Efelder
 
 |File name|License|Source/Author|
 |---|---|---|
-|assets/about.png [GUI]|CC0/public domain|[Buch](https://opengameart.org/content/unfinished-user-interfaces)|
-|assets/about.png [FONT]|CC0/public domain|[Buch](https://opengameart.org/content/three-little-bitmap-fonts)|
+|assets/about.png [GUI]|[CC0/public domain](https://creativecommons.org/publicdomain/zero/1.0/)|[Buch](https://opengameart.org/content/unfinished-user-interfaces)|
+|assets/about.png [FONT]|[CC0/public domain](https://creativecommons.org/publicdomain/zero/1.0/)|[Buch](https://opengameart.org/content/three-little-bitmap-fonts)|
 
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