diff --git a/setup.py b/setup.py
index b456217..7662f57 100644
--- a/setup.py
+++ b/setup.py
@@ -10,7 +10,7 @@ setup(
     license='MIT',
     url='http://github.com/romanz/trezor-agent',
     packages=['sshagent'],
-    install_requires=['ecdsa', 'trezor'],
+    install_requires=['ecdsa', 'trezor', 'bitcoin'],
     platforms=['POSIX'],
     classifiers=[
         'Development Status :: 3 - Alpha',
diff --git a/tox.ini b/tox.ini
index 3e952ac..6b02173 100644
--- a/tox.ini
+++ b/tox.ini
@@ -10,6 +10,7 @@ deps=
     pylint
     six
     ecdsa
+    bitcoin
 commands=
     pep8 sshagent
     pylint --report=no --rcfile .pylintrc sshagent