diff --git a/tox.ini b/tox.ini
index 0169fee..7429328 100644
--- a/tox.ini
+++ b/tox.ini
@@ -13,7 +13,7 @@ setenv = VIRTUAL_ENV={envdir}
          NOSE_COVER_ERASE=1
 deps =
     -r{toxinidir}/test-requirements.txt
-    https://launchpad.net/swift/kilo/2.3.0/+download/swift-2.3.0.tar.gz
+    https://launchpad.net/swift/liberty/2.5.0/+download/swift-2.5.0.tar.gz
 commands = nosetests {posargs:test/unit}
 
 [testenv:cover]