diff --git a/docs/calibration.md b/docs/calibration.md
index 52594aea..d90a798b 100644
--- a/docs/calibration.md
+++ b/docs/calibration.md
@@ -1,5 +1,9 @@
 <link rel=”manifest” href=”docs/manifest.webmanifest”>
 
+[![ko-fi](https://ko-fi.com/img/githubbutton_sm.svg)](https://ko-fi.com/U6U5NPB51)  
+
+---  
+
 # Calibration
 ***Note: This is WIP, so maybe come back another time as well! ;)***