diff --git a/main.py b/main.py
index 3aaf456..4fae49e 100644
--- a/main.py
+++ b/main.py
@@ -163,7 +163,7 @@ def initializeTxn(txex , segwitness) :
 block = Block (
   version = 0x20000002,
   prev_block= bytes.fromhex(base_block),
-  merkle_root= merkle_root(txides),
+  merkle_root= merkle_root(txides)[::-1],
   timestamp= int(ts),
   bits=bytes.fromhex('1f00ffff'),
   nonce= bytes.fromhex(nonce()), #nonce()) , #nonce should be of the bytes