diff --git a/CHANGELOG.md b/CHANGELOG.md
index 88138ca..1c29594 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
 
 ## [Unreleased]
 
+### Changed
+
+- Changed the main header in `README.md` from 'SDiagonalizability' to the more idiomatic 'SDiagonalizability.jl' (#61).
+
 ### Fixed
 
 - Fixed a typo in some comments in the *Aqua.jl* static analysis tests (#60).
diff --git a/README.md b/README.md
index 0127bad..a666a21 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 <img src="https://github.com/GraphQuantum/SDiagonalizability.jl/raw/main/docs/src/assets/logo.jpg" alt="GraphQuantum logo by Madiha Waqar" height="200"/>
 <sup><em>GraphQuantum</em> logo by <a href="https://github.com/madihaahmed1">Madiha Waqar</a></sup>
 
-# SDiagonalizability
+# SDiagonalizability.jl
 
 <table>
   <tr>