diff --git a/README.md b/README.md
index 78e381d..98fe2b4 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # QuAcK: a software for emerging quantum electronic structure methods
 
-<img src="logo/logo_quack.jpg"  width="250">
+<img src="logo/logo_quack.png"  width="250">
 
 **Contributors:**
 - [Pierre-Francois Loos](https://pfloos.github.io/WEB_LOOS)
diff --git a/logo/logo_quack.jpg b/logo/logo_quack.jpg
deleted file mode 100644
index 50c2898..0000000
Binary files a/logo/logo_quack.jpg and /dev/null differ
diff --git a/logo/logo_quack.png b/logo/logo_quack.png
new file mode 100644
index 0000000..d2f5a4e
Binary files /dev/null and b/logo/logo_quack.png differ