diff --git a/bitcoin-qt.pro b/bitcoin-qt.pro
index 832ce8bf17..4424b83cea 100644
--- a/bitcoin-qt.pro
+++ b/bitcoin-qt.pro
@@ -1,7 +1,7 @@
 TEMPLATE = app
 TARGET = darkcoin-qt
 macx:TARGET = "DarkCoin-Qt"
-VERSION = 0.8.8.0
+VERSION = 0.8.9.0
 INCLUDEPATH += src src/json src/qt
 QT += core gui network
 greaterThan(QT_MAJOR_VERSION, 4): QT += widgets
diff --git a/share/setup.nsi b/share/setup.nsi
index 77ea439191..479f2dc3c2 100644
--- a/share/setup.nsi
+++ b/share/setup.nsi
@@ -5,7 +5,7 @@ SetCompressor /SOLID lzma
 
 # General Symbol Definitions
 !define REGKEY "SOFTWARE\$(^Name)"
-!define VERSION 0.8.8.0
+!define VERSION 0.8.9.0
 !define COMPANY "DarkCoin project"
 !define URL http://www.darkcoin.io/
 
@@ -45,13 +45,13 @@ Var StartMenuGroup
 !insertmacro MUI_LANGUAGE English
 
 # Installer attributes
-OutFile darkcoin-0.8.6.2-win32-setup.exe
+OutFile darkcoin-0.8.0.0-win32-setup.exe
 InstallDir $PROGRAMFILES\DarkCoin
 CRCCheck on
 XPStyle on
 BrandingText " "
 ShowInstDetails show
-VIProductVersion 0.8.8.0
+VIProductVersion 0.8.9.0
 VIAddVersionKey ProductName DarkCoin
 VIAddVersionKey ProductVersion "${VERSION}"
 VIAddVersionKey CompanyName "${COMPANY}"
diff --git a/src/clientversion.h b/src/clientversion.h
index 8531fa39e8..7321636c08 100644
--- a/src/clientversion.h
+++ b/src/clientversion.h
@@ -8,7 +8,7 @@
 // These need to be macros, as version.cpp's and bitcoin-qt.rc's voodoo requires it
 #define CLIENT_VERSION_MAJOR       0
 #define CLIENT_VERSION_MINOR       8
-#define CLIENT_VERSION_REVISION    8
+#define CLIENT_VERSION_REVISION    9
 #define CLIENT_VERSION_BUILD       0
 
 // Set to true for release, false for prerelease or test build
diff --git a/src/main.cpp b/src/main.cpp
index 80080af653..e39fd1bad5 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1085,9 +1085,16 @@ int64 static GetBlockValue(int nBits, int nHeight, int64 nFees)
 
     int64 nSubsidy = 0; 
     if(nHeight >= 5465) {
-        nSubsidy = (11111.0 / (pow((dDiff+51.0)/6.0,2.0)));
-        if (nSubsidy > 500) nSubsidy = 500;
-        if (nSubsidy < 25) nSubsidy = 25;
+        if(nHeight >= 17000 && dDiff > 75) { // GPU/ASIC difficulty calc
+            // 2222222/(((x+2600)/9)^2)
+            nSubsidy = (2222222.0 / (pow((dDiff+2600.0)/9.0,2.0)));
+            if (nSubsidy > 25) nSubsidy = 25;
+            if (nSubsidy < 5) nSubsidy = 5;
+        } else { // CPU mining calc
+            nSubsidy = (11111.0 / (pow((dDiff+51.0)/6.0,2.0)));
+            if (nSubsidy > 500) nSubsidy = 500;
+            if (nSubsidy < 25) nSubsidy = 25;
+        }
     } else {
         nSubsidy = (1111.0 / (pow((dDiff+1.0),2.0)));
         if (nSubsidy > 500) nSubsidy = 500;
@@ -1097,8 +1104,8 @@ int64 static GetBlockValue(int nBits, int nHeight, int64 nFees)
     //printf("height %u diff %4.2f reward %i \n", nHeight, dDiff, nSubsidy);
     nSubsidy *= COIN;
 
-    // Subsidy is cut in half every 840000 blocks, which will occur approximately every 2 years
-    nSubsidy >>= (nHeight / 840000); // DarkCoin: 840k blocks in ~2 years
+    // Subsidy is cut in half every 210240 blocks, which will occur approximately every year
+    nSubsidy >>= (nHeight / 210240); // DarkCoin: 210k blocks in 1 year
 
     return nSubsidy + nFees;
 }