diff --git a/setup.py b/setup.py
index 8402c8afb..1b8536042 100644
--- a/setup.py
+++ b/setup.py
@@ -56,7 +56,7 @@ data_files += [
 setup(
     name="Electrum",
     version=version.ELECTRUM_VERSION,
-    install_requires=['slowaes', 'ecdsa>=0.9', 'pbkdf2', 'requests', 'pyasn1', 'tlslite>=0.4.5'],
+    install_requires=['slowaes', 'ecdsa>=0.9', 'pbkdf2', 'requests', 'pyasn1', 'pyasn1-modules', 'tlslite>=0.4.5'],
     package_dir={
         'electrum': 'lib',
         'electrum_gui': 'gui',