diff --git a/requirements-optional.txt b/requirements-optional.txt
index 94276761f0..a938405673 100644
--- a/requirements-optional.txt
+++ b/requirements-optional.txt
@@ -1 +1,3 @@
 hidapi >= 0.7.99.post20
+rlp >= 0.4.4
+ethjsonrpc >= 0.3.0
diff --git a/requirements.txt b/requirements.txt
index 7f09fe18c5..7214f4cabf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,4 +4,3 @@ requests>=2.4.0
 click>=6.2
 pyblake2>=0.9.3
 libusb1>=1.6.4
-rlp>=0.6.0
diff --git a/setup.py b/setup.py
index 41bc923756..47cf416371 100755
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,6 @@ install_requires = [
     'requests>=2.4.0',
     'click>=6.2',
     'pyblake2>=0.9.3',
-    'rlp>=0.6.0',
     'libusb1>=1.6.4',
 ]
 
@@ -89,6 +88,10 @@ setup(
     install_requires=install_requires,
     extras_require={
         'hidapi': ['hidapi>=0.7.99.post20'],
+        'ethereum': [
+            'rlp>=0.4.4',
+            'ethjsonrpc>=0.3.0',
+        ],
     },
     python_requires='>=3.3',
     include_package_data=True,