diff --git a/src/kernel.cpp b/src/kernel.cpp
index bf4d783..e654955 100644
--- a/src/kernel.cpp
+++ b/src/kernel.cpp
@@ -17,13 +17,13 @@ typedef std::map<int, unsigned int> MapModifierCheckpoints;
 // Hard checkpoints of stake modifiers to ensure they are deterministic
 static std::map<int, unsigned int> mapStakeModifierCheckpoints =
     boost::assign::map_list_of
-        ( 0, 0xbfa1d8e4fd11f4e7 )
+        ( 0, 0xfd11f4e7 )
     ;
 
 // Hard checkpoints of stake modifiers to ensure they are deterministic (testNet)
 static std::map<int, unsigned int> mapStakeModifierCheckpointsTestNet =
     boost::assign::map_list_of
-        ( 0, 0xbfa1d8e4fd11f4e7 )
+        ( 0, 0xfd11f4e7 )
     ;
 
 // Get time weight
diff --git a/src/main.cpp b/src/main.cpp
index 38817e8..a8069cc 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1116,7 +1116,7 @@ static unsigned int GetNextTargetRequiredV2(const CBlockIndex* pindexLast, bool
 
 unsigned int GetNextTargetRequired(const CBlockIndex* pindexLast, bool fProofOfStake)
 {
-    bool IS_POW = (pindexLast->nHeight < 10001) || (pindexLast->nHeight > 50000 && pindexLast->nHeight < 60001);
+    bool IS_POW = (pindexLast->nHeight < 14400);
 
     if (IS_POW) {
         return GetNextTargetRequiredV1(pindexLast, fProofOfStake);