diff --git a/requirements.txt b/requirements.txt
index 3cabe805..1b49350c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ ethereum>=2.3.2
 ethereum-input-decoder>=0.2.2
 eth-hash>=0.1.0
 eth-keyfile>=0.5.1
-eth-keys>=0.2.0b3
+eth-keys>=0.2.0b3,<0.3.0
 eth-rlp>=0.1.0
 eth-tester==0.1.0b32
 eth-typing>=2.0.0
diff --git a/setup.py b/setup.py
index b46a378f..58931527 100755
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@ REQUIRED = [
     "eth-account>=0.1.0a2,<=0.3.0",
     "eth-hash>=0.1.0",
     "eth-keyfile>=0.5.1",
-    "eth-keys>=0.2.0b3",
+    "eth-keys>=0.2.0b3,<0.3.0",
     "eth-rlp>=0.1.0",
     "eth-tester==0.1.0b32",
     "eth-typing>=2.0.0",