diff --git a/dev_requirements.txt b/dev_requirements.txt
index 8bd463833..5d6a78a0d 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -3,4 +3,5 @@ coveralls
 pytest>=2.9.0
 pytest-catchlog==1.2.2
 pytest-timeout==1.0.0
+py-ecc
 https://github.com/ethereum/serpent/tarball/develop