diff --git a/configure.ac b/configure.ac
index e061870bb75fa..a2362adccd02d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,7 +3,7 @@ AC_PREREQ([2.60])
 define(_CLIENT_VERSION_MAJOR, 0)
 define(_CLIENT_VERSION_MINOR, 12)
 define(_CLIENT_VERSION_REVISION, 3)
-define(_CLIENT_VERSION_BUILD, 0)
+define(_CLIENT_VERSION_BUILD, 1)
 define(_CLIENT_VERSION_IS_RELEASE, true)
 define(_COPYRIGHT_YEAR, 2018)
 AC_INIT([Paccoin Core],[_CLIENT_VERSION_MAJOR._CLIENT_VERSION_MINOR._CLIENT_VERSION_REVISION],[https://github.com/paccoinpay/paccoin/issues],[paccoincore])
diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index 9765233ccc6ff..372af096781d9 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -164,10 +164,10 @@ class CMainParams : public CChainParams {
         consensus.vDeployments[Consensus::DEPLOYMENT_DIP0001].nThreshold = 3226; // 80% of 4032
 
         // The best chain should have at least this much work.
-        consensus.nMinimumChainWork = uint256S("0x00000000000000000000000000000000000000000000001ce57d59788db15166"); // #43850
+        consensus.nMinimumChainWork = uint256S("0x0000000000000000000000000000000000000000000000203f8f83ae7bdcfdb6"); // #50590
 
         // By default assume that the signatures in ancestors of this block are valid.
-        consensus.defaultAssumeValid = uint256S("0x0000000000000be675f137fbf5cbe5e9d8cb0ea509d30252a02c30944f16970f"); // #43850
+        consensus.defaultAssumeValid = uint256S("0x0000000000002b2ce7aecd2367b13eb050e35aabbbaf5ce94568e8d684f4c6b4"); // #50590
 
         /**
          * The message start string is designed to be unlikely to occur in normal data.
@@ -226,9 +226,10 @@ class CMainParams : public CChainParams {
             boost::assign::map_list_of
             (  100,     uint256S("0x000005065df82218140bc7c59cfd6913eaa5a88f3255ccc977c546cb0beb9ff0"))
             (  7200,    uint256S("0x00000000000b7d73439cae777bae147b8daaee692a9e5e06fd8466749de39465"))
-            (  43850,   uint256S("0x0000000000000be675f137fbf5cbe5e9d8cb0ea509d30252a02c30944f16970f")),
-            1523327936, // * UNIX timestamp of last checkpoint block
-            144438,    // * total number of transactions between genesis and last checkpoint
+            (  43850,   uint256S("0x0000000000000be675f137fbf5cbe5e9d8cb0ea509d30252a02c30944f16970f"))
+            (  50590,   uint256S("0x0000000000002b2ce7aecd2367b13eb050e35aabbbaf5ce94568e8d684f4c6b4")),
+            1524410366, // * UNIX timestamp of last checkpoint block
+            167138,    // * total number of transactions between genesis and last checkpoint
                         //   (the tx=... number in the SetBestChain debug.log lines)
             1500        // * estimated number of transactions per day after checkpoint
         };
diff --git a/src/clientversion.h b/src/clientversion.h
index 32465acdaa4f7..87755e11be5ca 100644
--- a/src/clientversion.h
+++ b/src/clientversion.h
@@ -17,7 +17,7 @@
 #define CLIENT_VERSION_MAJOR 0
 #define CLIENT_VERSION_MINOR 12
 #define CLIENT_VERSION_REVISION 3
-#define CLIENT_VERSION_BUILD 0
+#define CLIENT_VERSION_BUILD 1
 
 //! Set to true for release, false for prerelease or test build
 #define CLIENT_VERSION_IS_RELEASE true
diff --git a/src/version.h b/src/version.h
index ff2c1a25e65a2..b373eee2e4444 100644
--- a/src/version.h
+++ b/src/version.h
@@ -19,7 +19,7 @@ static const int INIT_PROTO_VERSION = 209;
 static const int GETHEADERS_VERSION = 70077;
 
 //! disconnect from peers older than this proto version
-static const int MIN_PEER_PROTO_VERSION = 70212;
+static const int MIN_PEER_PROTO_VERSION = 70213;
 
 //! nTime field added to CAddress, starting with this version;
 //! if possible, avoid requesting addresses nodes older than this