diff --git a/README.md b/README.md
index 7b8a694..08d2ce0 100644
--- a/README.md
+++ b/README.md
@@ -13,3 +13,15 @@ Installation instructions:
 7. Press upload in the top left corner and wait for the flashing to finish.
 8. Unplug the device from the USB port.
 9. You’re done.
+
+
+**CHANGELOG**
+
+1.2
+Fixed a bug that caused trigger lengths to be shorter than 4ms.
+
+1.1
+Fixed a bug causing external and pulser mode triggering on the falling edge.
+
+1.0 
+Initial release.