Remove Libraries.io SourceRank.
diff --git a/README.rst b/README.rst
index 5370b34..1ddb8a2 100644
--- a/README.rst
+++ b/README.rst
@@ -17,10 +17,6 @@
    :target: https://coveralls.io/r/tkem/cachetools
    :alt: Test coverage
 
-.. image:: https://img.shields.io/librariesio/sourcerank/pypi/cachetools
-   :target: https://libraries.io/pypi/cachetools
-   :alt: Libraries.io SourceRank
-
 .. image:: https://img.shields.io/github/license/tkem/cachetools
    :target: https://raw.github.com/tkem/cachetools/master/LICENSE
    :alt: License