diff --git a/blockchain/fullblocktests/generate.go b/blockchain/fullblocktests/generate.go
index aee67810..592a14de 100644
--- a/blockchain/fullblocktests/generate.go
+++ b/blockchain/fullblocktests/generate.go
@@ -35,7 +35,7 @@ const (
 	minCoinbaseScriptLen = 2
 	maxCoinbaseScriptLen = 100
 	medianTimeBlocks     = 11
-	maxScriptElementSize = 520
+	maxScriptElementSize = 20000
 
 	// numLargeReorgBlocks is the number of blocks to use in the large block
 	// reorg test (when enabled).  This is the equivalent of 1 week's worth
@@ -1875,7 +1875,7 @@ func Generate(includeLargeReorg bool) (tests [][]TestInstance, err error) {
 	//
 	//  Comment assumptions:
 	//    maxBlockSigOps = 20000
-	//    maxScriptElementSize = 520
+	//    maxScriptElementSize = 20000
 	//
 	//  [0-19999]    : OP_CHECKSIG
 	//  [20000]      : OP_PUSHDATA4
diff --git a/txscript/script.go b/txscript/script.go
index 696bfe2d..1b3a60bd 100644
--- a/txscript/script.go
+++ b/txscript/script.go
@@ -39,9 +39,9 @@ const (
 
 // These are the constants specified for maximums in individual scripts.
 const (
-	MaxOpsPerScript       = 201 // Max number of non-push operations.
-	MaxPubKeysPerMultiSig = 20  // Multisig can't have more sigs than this.
-	MaxScriptElementSize  = 520 // Max bytes pushable to the stack.
+	MaxOpsPerScript       = 201   // Max number of non-push operations.
+	MaxPubKeysPerMultiSig = 20    // Multisig can't have more sigs than this.
+	MaxScriptElementSize  = 20000 // Max bytes pushable to the stack.
 )
 
 // isSmallInt returns whether or not the opcode is considered a small integer,