diff --git a/python/setup.cfg b/python/setup.cfg
index a775b81..5eaea7d 100644
--- a/python/setup.cfg
+++ b/python/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = eth-address-index
-version = 0.1.0a4
+version = 0.1.0a6
 description = Signed metadata declarations for ethereum addresses
 author = Louis Holbrook
 author_email = dev@holbrook.no
@@ -30,7 +30,7 @@ packages =
 	eth_token_index.runnable
 install_requires =
 	web3==5.12.2
-	crypto-dev-signer~=0.4.13b10
+	crypto-dev-signer~=0.4.13rc1
 tests_require =
 	eth-tester==0.5.0b2
 	py-evm==0.3.0a20