diff --git a/src/chainparams.cpp b/src/chainparams.cpp
index f14b1e1..5d447bb 100644
--- a/src/chainparams.cpp
+++ b/src/chainparams.cpp
@@ -238,6 +238,12 @@ class CTestNetParams : public CChainParams {
         fRequireStandard = false;
         fMineBlocksOnDemand = false;
 
+        // Hardfork params
+        consensus.nSwitchKGW2 = 0;
+        consensus.nSwitchKGW2prefork = 0;
+        consensus.nSwitchKGW2postfork = 0;
+        consensus.nSwitchDGW = 1;
+
         checkpointData = (CCheckpointData) {
             {
                 //{10000, uint256S("0x")},
@@ -308,6 +314,12 @@ class CRegTestParams : public CChainParams {
         fRequireStandard = false;
         fMineBlocksOnDemand = true; 
 
+        // Hardfork params
+        consensus.nSwitchKGW2 = 0;
+        consensus.nSwitchKGW2prefork = 0;
+        consensus.nSwitchKGW2postfork = 0;
+        consensus.nSwitchDGW = 1;
+
         checkpointData = (CCheckpointData) {
             {
                 {0, uint256S("0x2574af5d531ba2c7b1b2994de62ae356699cb579cd744cf5dc8a565fce6db638")},
diff --git a/src/komodo_validation015.h b/src/komodo_validation015.h
index 350df18..e46d8b3 100755
--- a/src/komodo_validation015.h
+++ b/src/komodo_validation015.h
@@ -55,6 +55,7 @@
 
 #include <wallet/wallet.h>
 //#include <key_io.h>
+#include <chainparams.h>
 #include <base58.h>
 
 #define SATOSHIDEN ((uint64_t)100000000L)
@@ -1028,11 +1029,14 @@ void komodo_notarized_update(int32_t nHeight,int32_t notarized_height,uint256 no
         char fname[512];int32_t latestht = 0;
         //decode_hex(NOTARY_PUBKEY33,33,(char *)NOTARY_PUBKEY.c_str());
         pthread_mutex_init(&komodo_mutex,NULL);
+        std::string suffix = Params().NetworkIDString() == "main" ? "" : "_" + Params().NetworkIDString();
+        std::string sep;
 #ifdef _WIN32
-        sprintf(fname,"%s\\notarizations",GetDataDir().string().c_str());
+        sep = "\\";
 #else
-        sprintf(fname,"%s/notarizations",GetDataDir().string().c_str());
+        sep = "/";
 #endif
+        sprintf(fname,"%s%snotarizations%s",GetDefaultDataDir().string().c_str(), sep.c_str(), suffix.c_str());
         printf("fname.(%s)\n",fname);
         if ( (fp= fopen(fname,"rb+")) == 0 )
             fp = fopen(fname,"wb+");
diff --git a/src/pow.cpp b/src/pow.cpp
index fb7eb5c..3030c51 100755
--- a/src/pow.cpp
+++ b/src/pow.cpp
@@ -280,11 +280,27 @@ unsigned int GetNextWorkRequired(const CBlockIndex* pindexLast, const CBlockHead
 	int64_t					PastSecondsMin				= TimeDaySeconds * 0.01;
 	int64_t					PastSecondsMax				= TimeDaySeconds * 0.14;
 	
-    //unsigned int nProofOfWorkLimit = UintToArith256(params.powLimit).GetCompact();
+    unsigned int nProofOfWorkLimit = UintToArith256(params.powLimit).GetCompact();
 
     // Genesis block
-    //if (pindexLast == NULL)
-    //    return nProofOfWorkLimit;
+    if (pindexLast == NULL)
+        return nProofOfWorkLimit;
+if (params.fPowAllowMinDifficultyBlocks)
+        {
+            // Special difficulty rule for testnet:
+            // If the new block's timestamp is more than 2* 10 minutes
+            // then allow mining of a min-difficulty block.
+            if (pblock->GetBlockTime() > pindexLast->GetBlockTime() + params.nPowTargetSpacing*2)
+                return nProofOfWorkLimit;
+            else
+            {
+                // Return the last non-special-min-difficulty-rules-block
+                const CBlockIndex* pindex = pindexLast;
+                while (pindex->pprev && pindex->nHeight % params.DifficultyAdjustmentInterval() != 0 && pindex->nBits == nProofOfWorkLimit)
+                    pindex = pindex->pprev;
+                return pindex->nBits;
+            }
+}
 
     if(pindexLast->nHeight+1 < params.nSwitchKGW2)
     {
@@ -365,4 +381,4 @@ bool CheckProofOfWork(uint256 hash, unsigned int nBits, const Consensus::Params&
         return false;
 
     return true;
-}
\ No newline at end of file
+}