diff --git a/src/main/scala/rosen/bridge/scripts/RepoConfig.es b/src/main/scala/rosen/bridge/scripts/RepoConfig.es
index 2c3b492..d924329 100644
--- a/src/main/scala/rosen/bridge/scripts/RepoConfig.es
+++ b/src/main/scala/rosen/bridge/scripts/RepoConfig.es
@@ -1,7 +1,7 @@
 {
   // ----------------- REGISTERS
   // R4: Coll[Long] = [Commitment RWT count, Watcher quorum percentage, approval offset, maximum needed approval, 
-  //                   Collateral Erg amount, Collateral Rsn Amount, Total repo count]
+  //                   Collateral Erg amount, Collateral Rsn Amount]
   // (Minimum number of commitments needed for an event is: 
   //  min(R4[3], R4[1] * (total number of watchers) / 100 + R4[2]))
   // ----------------- TOKENS
diff --git a/src/main/scala/rosen/bridge/scripts/RwtRepo.es b/src/main/scala/rosen/bridge/scripts/RwtRepo.es
index d63a367..187e5d9 100644
--- a/src/main/scala/rosen/bridge/scripts/RwtRepo.es
+++ b/src/main/scala/rosen/bridge/scripts/RwtRepo.es
@@ -20,6 +20,7 @@
     val repoReplication = allOf(
       Coll(
         repoOut.propositionBytes == repo.propositionBytes,
+        repoOut.value >= repo.value,
         repoOut.tokens(0)._1 == repo.tokens(0)._1,
         repoOut.tokens(0)._2 == repo.tokens(0)._2,
         repoOut.tokens(1)._1 == repo.tokens(1)._1,
diff --git a/src/test/scala/contracts/ContractTest.scala b/src/test/scala/contracts/ContractTest.scala
index c967d18..f1d00f8 100644
--- a/src/test/scala/contracts/ContractTest.scala
+++ b/src/test/scala/contracts/ContractTest.scala
@@ -180,8 +180,9 @@ class ContractTest extends TestSuite {
     networkConfig._1.ergoClient.execute(ctx => {
       val prover = getProver()
       val userBox = Boxes.createBoxForUser(ctx, prover.getAddress, 2e9.toLong, new ErgoToken(networkConfig._3.RSN, 200L))
-      val repoConfig = Boxes.createRepoConfigsInput(ctx)
-      val repoBox = Boxes.createRepoInput(ctx, 100000, 5801L, 100L, 0)
+      val repoConfig = Boxes.createRepoConfigsWithList(ctx, Boxes.getRandomHexString(), Array(10L, 51L, 0L, 9999L, 1e9.toLong, 100))
+        .convertToInputWith(Boxes.getRandomHexString(), 1)
+      val repoBox = Boxes.createRepoInput(ctx, 100000, 5801L, 100L, 1)
       val repoOut = Boxes.createRepo(ctx, 99900, 5901L, 99L, 2)
       val permitBox = Boxes.createPermitBox(ctx, 100L, repoBox.getId.getBytes)
       val WID = Boxes.createBoxCandidateForUser(ctx, prover.getAddress, Configs.minBoxValue, new ErgoToken(repoBox.getId.getBytes, 3L))
@@ -198,6 +199,41 @@ class ContractTest extends TestSuite {
     })
   }
 
+  /**
+   * @target get permit transaction signing should throw error when repo value decreased in transaction
+   * @dependencies
+   * @scenario
+   * - mock user input
+   * - mock input repo box with 1e10 value
+   * - mock valid repoConfig box as data input
+   * - mock valid output repo box with 1e9 value
+   * - mock valid output wid, collateral and permit box
+   * - build and sign the get permit transaction
+   * @expected
+   * - sign error since 1e9 is less than 1e10
+   */
+  property("get permit transaction signing should throw error when repo value decreased in transaction") {
+    networkConfig._1.ergoClient.execute(ctx => {
+      val prover = getProver()
+      val userBox = Boxes.createBoxForUser(ctx, prover.getAddress, 2e9.toLong, new ErgoToken(networkConfig._3.RSN, 200L))
+      val repoConfig = Boxes.createRepoConfigsInput(ctx)
+      val repoBox = Boxes.createRepoInput(ctx, 100000, 5801L, 100L, 1, 1e10.toLong)
+      val repoOut = Boxes.createRepo(ctx, 99900, 5901L, 99L, 2, 1e9.toLong)
+      val permitBox = Boxes.createPermitBox(ctx, 100L, repoBox.getId.getBytes)
+      val WID = Boxes.createBoxCandidateForUser(ctx, prover.getAddress, Configs.minBoxValue, new ErgoToken(repoBox.getId.getBytes, 3L))
+      val watcherCollateral = Boxes.createWatcherCollateralBox(ctx, 1e9.toLong, 100, repoBox.getId.getBytes, 100)
+      val tx = ctx.newTxBuilder().addInputs(repoBox, userBox)
+        .fee(Configs.fee)
+        .addDataInputs(repoConfig)
+        .addOutputs(repoOut, watcherCollateral, permitBox, WID)
+        .sendChangeTo(prover.getAddress)
+        .build()
+      assertThrows[AnyRef] {
+        prover.sign(tx)
+      }
+    })
+  }
+
   /**
    * @target get permit transaction signing should throw error when creating a fake collateral not containing AWC
    * @dependencies
diff --git a/src/test/scala/testUtils/Boxes.scala b/src/test/scala/testUtils/Boxes.scala
index cddcbba..b7e332b 100644
--- a/src/test/scala/testUtils/Boxes.scala
+++ b/src/test/scala/testUtils/Boxes.scala
@@ -176,10 +176,11 @@ object Boxes {
                             nftId: String,
                             rwtId: String,
                             awcId: String,
+                            value: Long = Configs.minBoxValue,
                           ): OutBox = {
     val txB = ctx.newTxBuilder()
     val repoBuilder = txB.outBoxBuilder()
-      .value(Configs.minBoxValue)
+      .value(value)
       .tokens(
         new ErgoToken(nftId, 1),
         new ErgoToken(rwtId, RWTCount),
@@ -226,8 +227,9 @@ object Boxes {
                   RSNCount: Long,
                   AwcCount: Long,
                   watcherCount: Long,
+                  value: Long = Configs.minBoxValue,
                 ): OutBox = {
-    createRepoWithTokens(ctx, RWTCount, RSNCount, AwcCount, watcherCount, networkConfig._3.RepoNFT, networkConfig._2.tokens.RWTId, networkConfig._2.tokens.AwcNFT)
+    createRepoWithTokens(ctx, RWTCount, RSNCount, AwcCount, watcherCount, networkConfig._3.RepoNFT, networkConfig._2.tokens.RWTId, networkConfig._2.tokens.AwcNFT, value)
   }
 
   def createRepoInput(
@@ -236,8 +238,9 @@ object Boxes {
                        RSNCount: Long,
                        AwcCount: Long,
                        watcherCount: Long,
+                       value: Long = Configs.minBoxValue,
                      ): InputBox = {
-    createRepo(ctx, RWTCount, RSNCount, AwcCount, watcherCount).convertToInputWith(Boxes.getRandomHexString(), 0)
+    createRepo(ctx, RWTCount, RSNCount, AwcCount, watcherCount, value).convertToInputWith(Boxes.getRandomHexString(), 0)
   }
 
   def createPermitBox(ctx: BlockchainContext, RWTCount: Long, WID: Array[Byte], tokens: ErgoToken*): OutBox = {