diff --git a/requirements.txt b/requirements.txt
index 33793d7b..ccb06e82 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 argparse
 jsonschema
+plumbum
 pyyaml
 simplejson
 
diff --git a/setup.py b/setup.py
index 24ae8eb7..9033e75e 100644
--- a/setup.py
+++ b/setup.py
@@ -8,6 +8,7 @@ setup(
     install_requires=[
         'argparse',
         'jsonschema',
+        'plumbum',
         'pyyaml',
         'simplejson',
     ],