diff --git a/README.rst b/README.rst
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--- a/README.rst
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 ============
 
 .. image:: https://travis-ci.org/pyca/cryptography.png?branch=master
-   :target: https://travis-ci.org/pyca/cryptography
+    :target: https://travis-ci.org/pyca/cryptography
+
+.. image:: https://coveralls.io/repos/pyca/cryptography/badge.png?branch=master
+    :target: https://coveralls.io/r/pyca/cryptography?branch=master
+
 
 ``cryptography`` is a package designed to expose cryptographic recipes and
 primitives to Python developers.