diff --git a/fork.py b/fork.py
index 3722a77..26dc0e8 100644
--- a/fork.py
+++ b/fork.py
@@ -3,7 +3,7 @@ def __init__(self):
         self.POW_FORK = 1450000
         self.POW_FORK_TESTNET = 894170
         self.FORK_AHEAD = 5
-        self.versions_remove = ['mainnet0019', 'mainnet0018', 'mainnet0017']
+        self.versions_remove = ['mainnet0020', 'mainnet0019', 'mainnet0018', 'mainnet0017']
         self.FORK_REWARD = None
         self.FORK_REWARD_TESTNET = None
         self.PASSED = False