diff --git a/setup.py b/setup.py
index 1f2a3dee..d1c239aa 100644
--- a/setup.py
+++ b/setup.py
@@ -24,7 +24,7 @@
                     ["wormhole = wormhole.cli.runner:entry",
                      "wormhole-server = wormhole.server.runner:entry",
                      ]},
-      install_requires=["spake2==0.3", "pynacl", "argparse",
+      install_requires=["spake2==0.7", "pynacl", "argparse",
                         "six",
                         "twisted==16.1.1", # since autobahn pins it
                         "autobahn[twisted]",