diff --git a/README.md b/README.md
index 18dc577a2421d980f4a8279bbeae996677bf4305..27da846f1d18ae6d6b4de9c616b96eac0b5137eb 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@ dynamic-graph
 =============
 
 [![Build Status](https://travis-ci.org/stack-of-tasks/dynamic-graph.png)](https://travis-ci.org/stack-of-tasks/dynamic-graph)
-[![Coverage Status](https://coveralls.io/repos/stack-of-tasks/dynamic-graph/badge.png)](https://coveralls.io/r/stack-of-tasks/dynamic-graph)
+[![Coverage Status](https://coveralls.io/repos/stack-of-tasks/dynamic-graph/badge.png?branch=master)](https://coveralls.io/r/stack-of-tasks/dynamic-graph?branch=master)
 
 
 This software provides an efficient way to modelize a C++ data-flow.