diff --git a/hardware/README.md b/hardware/README.md
index dbbe53c..48cc3ec 100644
--- a/hardware/README.md
+++ b/hardware/README.md
@@ -6,4 +6,4 @@ Currently I provide the current status of the designed hardware used in the HW H
 
 The used keypad is a standard 4x4 matrix keypad you'll found for arduino and co.
 
-The schematic, breadboard design and Fritzing data are licensed under the Creative-Commons-Lizenz Attribution-ShareAlike 3.0 Unported (CC-by-sa-3.0) - https://creativecommons.org/licenses/by-sa/3.0/legalcode
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+The schematic, breadboard design and Fritzing data are licensed under the Creative-Commons-Lizenz Attribution-ShareAlike 4.0 Unported (CC-BY-SA-4.0) - https://creativecommons.org/licenses/by-sa/4.0/legalcode
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