diff --git a/CHANGELOG.md b/CHANGELOG.md
index e73cd4b..ba8f5b0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # CHANGELOG
 
+## 2.1.42
+
+update bsv lib
+- fix transaction over the maximum block size
+- `signTx` add `hashCache` parameter
+
 ## 2.1.37
 
 - update bsv lib
diff --git a/patches/bsv/lib/transaction/transaction.js b/patches/bsv/lib/transaction/transaction.js
index e35c7d5..adb16d1 100644
--- a/patches/bsv/lib/transaction/transaction.js
+++ b/patches/bsv/lib/transaction/transaction.js
@@ -62,7 +62,6 @@ function Transaction (serialized) {
 
 var CURRENT_VERSION = 1
 var DEFAULT_NLOCKTIME = 0
-var MAX_BLOCK_SIZE = 1000000
 
 // Minimum amount for an output for it not to be considered a dust output
 Transaction.DUST_AMOUNT = 1
@@ -1201,11 +1200,6 @@ Transaction.prototype.verify = function (notVerifyInput) {
     }
   }
 
-  // Size limits
-  if (this.toBuffer().length > MAX_BLOCK_SIZE) {
-    return 'transaction over the maximum block size'
-  }
-
   // Check for duplicate inputs
   var txinmap = {}
   for (i = 0; i < this.inputs.length; i++) {