diff --git a/README.md b/README.md
index de5cb74..9ed2498 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# QuAcK: a open-source software for emerging quantum electronic structure methods
+# QuAcK: an open-source software for emerging quantum electronic structure methods
 
 <img src="logo/logo_quack.png"  width="250">