diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index ad8d7f8..9eb876e 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,3 +1,8 @@
+4/09/2022
+v0.13.0
+ADDED - New set of mathematical constants and functions common in Physics
+ADDED - New Physics formulas: Pressure, Normal Force, Angular Frequency.
+
 3/09/2022
 v0.12.0
 ADDED - Now functions will return a value and the respective measurement unit (except Lorentz factor).