diff --git a/requirements.txt b/requirements.txt
index 7ae0d83d..c34147e3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,7 @@
 coloredlogs>=10.0
 configparser>=3.5.0
 coverage
+py_ecc==1.4.2
 eth_abi==1.3.0
 eth-account>=0.1.0a2
 ethereum>=2.3.2
diff --git a/setup.py b/setup.py
index ff87c3d1..de0da994 100755
--- a/setup.py
+++ b/setup.py
@@ -74,6 +74,7 @@ setup(
     packages=find_packages(exclude=["contrib", "docs", "tests"]),
     install_requires=[
         "coloredlogs>=10.0",
+        "py_ecc==1.4.2",
         "ethereum>=2.3.2",
         "z3-solver>=4.8.0.0",
         "requests",