diff --git a/Project.toml b/Project.toml
index 3ba16d1..b8f2fbd 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "TightBindingApproximation"
 uuid = "d3576f78-cb9d-4774-9dc5-b247cf392ff4"
 authors = ["waltergu <waltergu1989@gmail.com>"]
-version = "0.1.20"
+version = "0.1.21"
 
 [deps]
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"