diff --git a/README.md b/README.md
index bf093bc45c4..133a5519467 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 [![Maven Central](https://img.shields.io/maven-central/v/fr.inria.gforge.spoon/spoon-core.svg)](http://search.maven.org/#search%7Cga%7C1%7Cg%3A%22fr.inria.gforge.spoon%22%20AND%20a%3A%22spoon-core%22)
 [![GHA tests Workflow Status](https://github.com/INRIA/spoon/actions/workflows/tests.yml/badge.svg)](https://github.com/INRIA/spoon/actions/workflows/tests.yml)
-[![Coverage Status](https://coveralls.io/repos/INRIA/spoon/badge.png)](https://coveralls.io/r/INRIA/spoon)
+[![Coverage Status](https://coveralls.io/repos/INRIA/spoon/badge.svg)](https://coveralls.io/r/INRIA/spoon)
 [![Maintainability Rating](https://sonarqube.ow2.org/api/project_badges/measure?project=fr.inria.gforge.spoon%3Aspoon-core&metric=sqale_rating)](https://sonarqube.ow2.org/dashboard?id=fr.inria.gforge.spoon%3Aspoon-core)
 [![Reproducible Builds](https://img.shields.io/badge/Reproducible_Builds-ok-success?labelColor=1e5b96)](https://github.com/jvm-repo-rebuild/reproducible-central#fr.inria.gforge.spoon:spoon-core)