diff --git a/setup.py b/setup.py
index 66e619f..cbd0acc 100644
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,7 @@ packages = [
 install_requires = [
     'httplib2>=0.9.1',
     'pyasn1>=0.1.7',
-    'pyasn1_modules>=0.0.5',
+    'pyasn1-modules>=0.0.5',
     'rsa>=3.1.4',
     'six>=1.6.1',
 ]