diff --git a/bitcoin.cpp b/bitcoin.cpp
index 9ccbabf9..f024f62c 100644
--- a/bitcoin.cpp
+++ b/bitcoin.cpp
@@ -80,7 +80,7 @@ class CNode {
     CAddress me(CService("0.0.0.0"));
     BeginMessage("version");
     int nBestHeight = GetRequireHeight();
-    string ver = "/bitcoin-seeder:0.01/";
+    string ver = "/zcash-seeder:0.01/";
     vSend << PROTOCOL_VERSION << nLocalServices << nTime << you << me << nLocalNonce << ver << nBestHeight;
     EndMessage();
   }
diff --git a/db.h b/db.h
index 55e11496..ede71e9e 100644
--- a/db.h
+++ b/db.h
@@ -12,11 +12,12 @@
 
 #define MIN_RETRY 1000
 
-#define REQUIRE_VERSION 70001
+#define REQUIRE_VERSION 170005
 
 static inline int GetRequireHeight(const bool testnet = fTestNet)
 {
-    return testnet ? 500000 : 350000;
+    // return testnet ? 500000 : 350000;
+    return 0;
 }
 
 std::string static inline ToString(const CService &ip) {
diff --git a/main.cpp b/main.cpp
index d41f78c9..d8d1fac1 100644
--- a/main.cpp
+++ b/main.cpp
@@ -81,17 +81,17 @@ class CDnsSeedOpts {
           host = optarg;
           break;
         }
-        
+
         case 'm': {
           mbox = optarg;
           break;
         }
-        
+
         case 'n': {
           ns = optarg;
           break;
         }
-        
+
         case 't': {
           int n = strtol(optarg, NULL, 10);
           if (n > 0 && n < 1000) nThreads = n;
@@ -389,18 +389,14 @@ extern "C" void* ThreadStats(void*) {
   } while(1);
 }
 
-static const string mainnet_seeds[] = {"dnsseed.bluematt.me", "bitseed.xf2.org", "dnsseed.bitcoin.dashjr.org", "seed.bitcoin.sipa.be", ""};
-static const string testnet_seeds[] = {"testnet-seed.alexykot.me",
-                                       "testnet-seed.bitcoin.petertodd.org",
-                                       "testnet-seed.bluematt.me",
-                                       "testnet-seed.bitcoin.schildbach.de",
-                                       ""};
+static const string mainnet_seeds[] = {"mainnet.z.cash", "dnsseed.str4d.xyz", "dnsseed.znodes.org", ""};
+static const string testnet_seeds[] = {"testnet.z.cash", "explorer.testnet.z.cash", ""};
 static const string *seeds = mainnet_seeds;
 
 extern "C" void* ThreadSeeder(void*) {
-  if (!fTestNet){
-    db.Add(CService("kjy2eqzk4zwi5zd3.onion", 8333), true);
-  }
+  //if (!fTestNet){
+  //  db.Add(CService("kjy2eqzk4zwi5zd3.onion", 8333), true);
+  //}
   do {
     for (int i=0; seeds[i] != ""; i++) {
       vector<CNetAddr> ips;
@@ -450,10 +446,10 @@ int main(int argc, char **argv) {
   bool fDNS = true;
   if (opts.fUseTestNet) {
       printf("Using testnet.\n");
-      pchMessageStart[0] = 0x0b;
-      pchMessageStart[1] = 0x11;
-      pchMessageStart[2] = 0x09;
-      pchMessageStart[3] = 0x07;
+      pchMessageStart[0] = 0xFA;
+      pchMessageStart[1] = 0x1A;
+      pchMessageStart[2] = 0x24;
+      pchMessageStart[3] = 0xB6;
       seeds = testnet_seeds;
       fTestNet = true;
   }
diff --git a/protocol.cpp b/protocol.cpp
index 3df8a187..f4776679 100644
--- a/protocol.cpp
+++ b/protocol.cpp
@@ -22,7 +22,7 @@ static const char* ppszTypeName[] =
     "block",
 };
 
-unsigned char pchMessageStart[4] = { 0xf9, 0xbe, 0xb4, 0xd9 };
+unsigned char pchMessageStart[4] = { 0x24, 0xE9, 0x27, 0x64 };
 
 CMessageHeader::CMessageHeader()
 {
diff --git a/protocol.h b/protocol.h
index e9be1c22..6b77fefb 100644
--- a/protocol.h
+++ b/protocol.h
@@ -18,7 +18,7 @@
 extern bool fTestNet;
 static inline unsigned short GetDefaultPort(const bool testnet = fTestNet)
 {
-    return testnet ? 18333 : 8333;
+    return testnet ? 18233 : 8233;
 }
 
 //
diff --git a/serialize.h b/serialize.h
index 4e677c3c..7916e6c5 100644
--- a/serialize.h
+++ b/serialize.h
@@ -60,7 +60,7 @@ class CDataStream;
 class CAutoFile;
 static const unsigned int MAX_SIZE = 0x02000000;
 
-static const int PROTOCOL_VERSION = 60000;
+static const int PROTOCOL_VERSION = 170005;
 
 // Used to bypass the rule against non-const reference to temporary
 // where it makes sense with wrappers such as CFlatData or CTxDB