diff --git a/configure.ac b/configure.ac
index 9ab9e4ce3a..079f81cef4 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,7 +2,7 @@ dnl require autoconf 2.60 (AS_ECHO/AS_ECHO_N)
 AC_PREREQ([2.60])
 define(_CLIENT_VERSION_MAJOR, 2)
 define(_CLIENT_VERSION_MINOR, 1)
-define(_CLIENT_VERSION_REVISION, 4)
+define(_CLIENT_VERSION_REVISION, 5)
 define(_CLIENT_VERSION_BUILD, 0)
 define(_CLIENT_VERSION_RC, 0)
 define(_CLIENT_VERSION_IS_RELEASE, true)
diff --git a/src/pow.cpp b/src/pow.cpp
index 62b871868a..ad5a47ff2b 100644
--- a/src/pow.cpp
+++ b/src/pow.cpp
@@ -141,7 +141,7 @@ unsigned int GetNextWorkRequiredPOSV2(const CBlockIndex* pIndexLast)
     const auto posLimit = consensus.ProofOfStakeLimit(fIsTimeProtocolV2);
  
     // Fetch the target block spacing time and timespan
-    int64_t nTargetSpacing = consensus.nTargetSpacing;
+    int64_t nTargetSpacing = nHeight > 2255000 ? consensus.nTargetSpacingV2 : consensus.nTargetSpacing;
 
     const int nTargetBlocksPerDay = DAY_IN_SECONDS / nTargetSpacing;
     const int nTargetBlocksPerWeek = WEEK_IN_SECONDS / nTargetSpacing;
diff --git a/src/version.h b/src/version.h
index 9667019b38..4c4104ff05 100644
--- a/src/version.h
+++ b/src/version.h
@@ -12,7 +12,7 @@
  * network protocol versioning
  */
 
-static const int PROTOCOL_VERSION = 70106;
+static const int PROTOCOL_VERSION = 70107;
 
 //! initial proto version, to be increased after version/verack negotiation
 static const int INIT_PROTO_VERSION = 209;