diff --git a/README.md b/README.md
index 57ca33c..1d67aa3 100644
--- a/README.md
+++ b/README.md
@@ -35,7 +35,9 @@ Arduino based project running on my custom made board
 * 1x 4.7k ohm resistor
 * 1x 7cmx5cm pcb
 
-## The software
+## The software :
 
-### The librairies used :
-* 
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+### External librairies used :
+* Adafruit_SSD1306 (not my work) [link](https://github.com/adafruit/Adafruit_SSD1306)
+* Adafruit-GFX (not my work) [link](https://github.com/adafruit/Adafruit-GFX-Library)
+* RTClib-master (not my work) [link](https://github.com/adafruit/RTClib)
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