diff --git a/README.md b/README.md
index 4bcad1a5..f5d90d6e 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,7 @@ Key features:
 - Arbitrary precision arithmetic
 - High precision approximation
 - Complex numbers
+- Derivatives
 - Logic optimization
 - Rich display of math expressions
 - Copy and paste expressions