diff --git a/src/merkle_tree.cairo b/src/merkle_tree.cairo
index 83290afc..0cbe3752 100644
--- a/src/merkle_tree.cairo
+++ b/src/merkle_tree.cairo
@@ -9,7 +9,7 @@ pub fn merkle_root(ref txids: Array<Array<u32>>) -> u256 {
         let mut i: u32 = 0;
         while i != 8 {
             let element: u256 = (*txid[i]).into();
-            root += shl(element, (8 * i));
+            root += shl(element, (32 * i));
 
             i += 1;
         };
diff --git a/src/utils.cairo b/src/utils.cairo
index e25d0642..025124b2 100644
--- a/src/utils.cairo
+++ b/src/utils.cairo
@@ -115,7 +115,6 @@ const TWO_POW_96: u128 = 0x1000000000000000000000000;
 
 pub fn double_sha256(a: @Array<u32>, b: @Array<u32>) -> Array<u32> {
     let mut input1: Array<u32> = array![];
-
     input1.append_span(a.span());
     input1.append_span(b.span());