diff --git a/requirements.txt b/requirements.txt
index a3e66d31d0..be94d06d9d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,3 +5,4 @@ click>=6.2
 pyblake2>=0.9.3
 hidapi>=0.7.99.post20
 libusb1>=1.6.4
+rlp>=0.6.0
diff --git a/setup.py b/setup.py
index 4c4bae36b7..8da3a4b48b 100755
--- a/setup.py
+++ b/setup.py
@@ -8,6 +8,7 @@ install_requires = [
     'requests>=2.4.0',
     'click>=6.2',
     'pyblake2>=0.9.3',
+    'rlp>=0.6.0',
 ]
 
 import sys