diff --git a/p2pool/networks/bitcoin.py b/p2pool/networks/bitcoin.py
index 5841d7d75..2048dafa4 100644
--- a/p2pool/networks/bitcoin.py
+++ b/p2pool/networks/bitcoin.py
@@ -24,4 +24,4 @@
 VERSION_CHECK = lambda v: None if 100000 <= v else 'Bitcoin version too old. Upgrade to 0.11.2 or newer!' # not a bug. BIP65 support is ensured by SOFTFORKS_REQUIRED
 VERSION_WARNING = lambda v: None
 SOFTFORKS_REQUIRED = set(['bip65', 'csv'])
-MINIMUM_PROTOCOL_VERSION = 1500
+MINIMUM_PROTOCOL_VERSION = 1600