diff --git a/core-test/src/test/scala/org/bitcoins/core/script/locktime/LockTimeInterpreterTest.scala b/core-test/src/test/scala/org/bitcoins/core/script/locktime/LockTimeInterpreterTest.scala
index 08adaf085c..95e108ebda 100644
--- a/core-test/src/test/scala/org/bitcoins/core/script/locktime/LockTimeInterpreterTest.scala
+++ b/core-test/src/test/scala/org/bitcoins/core/script/locktime/LockTimeInterpreterTest.scala
@@ -67,7 +67,7 @@ class LockTimeInterpreterTest extends FlatSpec with MustMatchers {
     )
     val baseProgram = PreExecutionScriptProgram(t)
     val program = ScriptProgramTestUtil.toPreExecutionScriptProgram(
-      ScriptProgram(baseProgram, stack, script))
+      baseProgram.updateStackAndScript(stack, script))
     val newProgram = ScriptProgramTestUtil.toExecutedScriptProgram(
       LTI.opCheckLockTimeVerify(ScriptProgram.toExecutionInProgress(program)))
     newProgram.error must be(Some(ScriptErrorNegativeLockTime))
@@ -94,7 +94,7 @@ class LockTimeInterpreterTest extends FlatSpec with MustMatchers {
     val t = buildTxSigComponent(adjustedLockTimeTx)
     val baseProgram = PreExecutionScriptProgram(t)
     val program = ScriptProgramTestUtil.toPreExecutionScriptProgram(
-      ScriptProgram(baseProgram, stack, script))
+      baseProgram.updateStackAndScript(stack, script))
     val newProgram = ScriptProgramTestUtil.toExecutedScriptProgram(
       LTI.opCheckLockTimeVerify(ScriptProgram.toExecutionInProgress(program)))
     newProgram.error must be(Some(ScriptErrorUnsatisfiedLocktime))
@@ -121,7 +121,7 @@ class LockTimeInterpreterTest extends FlatSpec with MustMatchers {
     val t = buildTxSigComponent(adjustedLockTimeTx)
     val baseProgram = PreExecutionScriptProgram(t)
     val program = ScriptProgramTestUtil.toPreExecutionScriptProgram(
-      ScriptProgram(baseProgram, stack, script))
+      baseProgram.updateStackAndScript(stack, script))
     val newProgram = ScriptProgramTestUtil.toExecutedScriptProgram(
       LTI.opCheckLockTimeVerify(ScriptProgram.toExecutionInProgress(program)))
     newProgram.error must be(Some(ScriptErrorUnsatisfiedLocktime))
diff --git a/core/src/main/scala/org/bitcoins/core/script/ScriptProgram.scala b/core/src/main/scala/org/bitcoins/core/script/ScriptProgram.scala
index ccbb904667..9de083c603 100644
--- a/core/src/main/scala/org/bitcoins/core/script/ScriptProgram.scala
+++ b/core/src/main/scala/org/bitcoins/core/script/ScriptProgram.scala
@@ -88,6 +88,16 @@ case class PreExecutionScriptProgram(
       tokens: Seq[ScriptToken]): PreExecutionScriptProgram = {
     this.copy(originalScript = tokens.toList)
   }
+
+  def updateStackAndScript(
+      stackTokens: Seq[ScriptToken],
+      scriptTokens: Seq[ScriptToken]): PreExecutionScriptProgram = {
+    val updatedStack = this.updateStack(stackTokens)
+    val updatedScript = updatedStack.updateScript(scriptTokens)
+    require(updatedStack.stack == stackTokens)
+    require(updatedScript.script == scriptTokens)
+    updatedScript
+  }
 }
 
 object PreExecutionScriptProgram {
@@ -237,17 +247,6 @@ object ScriptProgram extends BitcoinSLogger {
     }
   }
 
-  def apply(
-      oldProgram: PreExecutionScriptProgram,
-      stackTokens: Seq[ScriptToken],
-      scriptTokens: Seq[ScriptToken]): PreExecutionScriptProgram = {
-    val updatedStack = oldProgram.updateStack(stackTokens)
-    val updatedScript = updatedStack.updateScript(scriptTokens)
-    require(updatedStack.stack == stackTokens)
-    require(updatedScript.script == scriptTokens)
-    updatedScript
-  }
-
   def apply(
       oldProgram: ExecutionInProgressScriptProgram,
       stackTokens: Seq[ScriptToken],