diff --git a/README.md b/README.md
index d89d8d021f..05a86ea756 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-Zcoin v0.13.8.1
+Zcoin v0.13.8.2
 ===============
 
 [![Build Status](https://travis-ci.com/zcoinofficial/zcoin.svg?branch=CI)](https://travis-ci.com/zcoinofficial/zcoin)
diff --git a/configure.ac b/configure.ac
index 63f6404352..c6d5733f1b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,7 +3,7 @@ AC_PREREQ([2.60])
 define(_CLIENT_VERSION_MAJOR, 0)
 define(_CLIENT_VERSION_MINOR, 13)
 define(_CLIENT_VERSION_REVISION, 8)
-define(_CLIENT_VERSION_BUILD, 1)
+define(_CLIENT_VERSION_BUILD, 2)
 define(_CLIENT_VERSION_IS_RELEASE, true)
 define(_COPYRIGHT_YEAR, 2019)
 define(_COPYRIGHT_HOLDERS,[The %s developers])
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 248cdeaf9c..6cb1523152 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -253,6 +253,7 @@ class CMainParams : public CChainParams {
 
         // Sigma related values.
         consensus.nSigmaStartBlock = ZC_SIGMA_STARTING_BLOCK;
+        consensus.nOldSigmaBanBlock = ZC_OLD_SIGMA_BAN_BLOCK;
         consensus.nZerocoinV2MintMempoolGracefulPeriod = ZC_V2_MINT_GRACEFUL_MEMPOOL_PERIOD;
         consensus.nZerocoinV2MintGracefulPeriod = ZC_V2_MINT_GRACEFUL_PERIOD;
         consensus.nZerocoinV2SpendMempoolGracefulPeriod = ZC_V2_SPEND_GRACEFUL_MEMPOOL_PERIOD;
@@ -440,6 +441,7 @@ class CTestNetParams : public CChainParams {
 
         // Sigma related values.
         consensus.nSigmaStartBlock = ZC_SIGMA_TESTNET_STARTING_BLOCK;
+        consensus.nOldSigmaBanBlock = 70416;
         consensus.nZerocoinV2MintMempoolGracefulPeriod = ZC_V2_MINT_TESTNET_GRACEFUL_MEMPOOL_PERIOD;
         consensus.nZerocoinV2MintGracefulPeriod = ZC_V2_MINT_TESTNET_GRACEFUL_PERIOD;
         consensus.nZerocoinV2SpendMempoolGracefulPeriod = ZC_V2_SPEND_TESTNET_GRACEFUL_MEMPOOL_PERIOD;
@@ -593,6 +595,7 @@ class CRegTestParams : public CChainParams {
 
         // Sigma related values.
         consensus.nSigmaStartBlock = 400;
+        consensus.nOldSigmaBanBlock = 450;
         consensus.nZerocoinV2MintMempoolGracefulPeriod = 2;
         consensus.nZerocoinV2MintGracefulPeriod = 5;
         consensus.nZerocoinV2SpendMempoolGracefulPeriod = 10;
diff --git a/src/consensus/params.h b/src/consensus/params.h
index 61a35db9e3..5e6adf803d 100644
--- a/src/consensus/params.h
+++ b/src/consensus/params.h
@@ -128,6 +128,9 @@ struct Params {
     // The block number after which sigma are accepted.
     int nSigmaStartBlock;
 
+    // The block number after which old sigma clients are banned.
+    int nOldSigmaBanBlock;
+
     // Number of blocks after nSigmaMintStartBlock during which we still accept zerocoin V2 mints into mempool.
     int nZerocoinV2MintMempoolGracefulPeriod;
 
diff --git a/src/main.cpp b/src/main.cpp
index 76eccc137c..eef6139150 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -6350,6 +6350,13 @@ bool static ProcessMessage(CNode *pfrom, string strCommand,
         if (!vRecv.empty()) {
             vRecv >> LIMITED_STRING(pfrom->strSubVer, MAX_SUBVERSION_LENGTH);
             pfrom->cleanSubVer = SanitizeString(pfrom->strSubVer);
+            if (nHeight > chainparams.GetConsensus().nOldSigmaBanBlock && pfrom->cleanSubVer == "/Satoshi:0.13.8.1/") {
+                pfrom->PushMessage(NetMsgType::REJECT, strCommand, REJECT_OBSOLETE, "This version is banned from the network");
+                pfrom->fDisconnect = 1;
+                LOCK(cs_main);
+                Misbehaving(pfrom->GetId(), 100);
+                return false;
+            }
         }
         if (!vRecv.empty()) {
             vRecv >> pfrom->nStartingHeight;
diff --git a/src/zerocoin_params.h b/src/zerocoin_params.h
index 58aa553542..5b69620697 100644
--- a/src/zerocoin_params.h
+++ b/src/zerocoin_params.h
@@ -42,6 +42,9 @@ static const int64_t DUST_HARD_LIMIT = 1000;   // 0.00001 XZC mininput
 #define ZC_SIGMA_STARTING_BLOCK         182030 //Approx July 23rd, 2019, 8:00 AM UTC
 #define ZC_SIGMA_TESTNET_STARTING_BLOCK 50000
 
+// The block number after which old sigma clients are banned.
+#define ZC_OLD_SIGMA_BAN_BLOCK          181850 //Approx July 22nd, 2019, 4:00 AM UTC
+
 // Number of blocks after ZC_SIGMA_STARTING_BLOCK during which we still accept zerocoin V2 mints into mempool.
 #define ZC_V2_MINT_GRACEFUL_MEMPOOL_PERIOD          4500
 #define ZC_V2_MINT_TESTNET_GRACEFUL_MEMPOOL_PERIOD  500