diff --git a/README.md b/README.md
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--- a/README.md
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 # wfrp4e-unofficial-grimoire
 
+Based on fan-made document from Skyperbole
+
+Icons from : 
+
+- Forgotten Adventures (Creative Commons Licence) for Familiars
+- FoundryVTT 0.7.3 Icons
+- Foundry system Pathfinder 1/2 Icons
+- Foundry system DnD5e 1/2 Icons
+