diff --git a/README.md b/README.md
index a83e1c7a..fe8c98c4 100644
--- a/README.md
+++ b/README.md
@@ -21,7 +21,7 @@ Originally forked from xmrig/xmrig with full development in C++11.
 * [Contacts](#contacts)
 
 ## Version
-* Code version: 0.0.5 
+* Code version: 0.0.6 
 
 ## Features
 * High performance.
@@ -101,7 +101,7 @@ Since avujic/xmr_arch64 version 0.0.2
 ## Other information
 * No HTTP support, only stratum protocol support.
 * No TLS support.
-* Default donation 3% (3 minutes in 100 minutes) can be reduced to 1% via command line option `--donate-level`.
+* Default donation 1% (1 minute in 100 minutes) can be reduced to 0% via command line option `--donate-level`.
 
 
 ### CPU mining performance
diff --git a/cmake/flags.cmake b/cmake/flags.cmake
index 488f1236..9e4a17b0 100644
--- a/cmake/flags.cmake
+++ b/cmake/flags.cmake
@@ -15,7 +15,8 @@ if (CMAKE_CXX_COMPILER_ID MATCHES GNU)
     set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Ofast -s -funroll-loops -fvariable-expansion-in-unroller -ftree-loop-if-convert-stores -fmerge-all-constants -fbranch-target-load-optimize2")
 
     if (XMRIG_ARMv8)
-        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv8-a+crypto")
+        #set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv8-a+crypto")
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv8-a+crc")
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=armv8-a+crypto -flax-vector-conversions")
     elseif (XMRIG_ARMv7)
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=neon")
@@ -56,8 +57,10 @@ elseif (CMAKE_CXX_COMPILER_ID MATCHES Clang)
     set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} -Ofast -funroll-loops -fmerge-all-constants")
 
     if (XMRIG_ARMv8)
-        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv8-a+crypto")
-        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=armv8-a+crypto")
+        #set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=armv8-a+crypto")
+        #set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=armv8-a+crypto")
+        set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS}     -mcpu=cortex-a53 -march=armv8-a+crc -mtune=cortex-a53")
+        set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mcpu=cortex-a53 -march=armv8-a+crc -mtune=cortex-a53")
     elseif (XMRIG_ARMv7)
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mfpu=neon -march=${CMAKE_SYSTEM_PROCESSOR}")
         set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mfpu=neon -march=${CMAKE_SYSTEM_PROCESSOR}")
diff --git a/src/donate.h b/src/donate.h
index 6d3b8599..75ce9135 100644
--- a/src/donate.h
+++ b/src/donate.h
@@ -36,7 +36,7 @@
  * If you plan on changing this setting to 0 please consider making a one off donation to my wallet:
  * XMR:[44bF1RTZVcVc45wNiDQVTp7hwyZ5juMf8W78j1YrfChkP2og2Y44ph3WbwaVe4vUMveKAzAiA4j8xgUi29TpKXpm42GAEjd]
  */
-constexpr const int kDonateLevel = 3;
+constexpr const int kDonateLevel = 1;
 
 
 #endif /* __DONATE_H__ */
diff --git a/src/version.h b/src/version.h
index 0f50b7f6..7d44a6d9 100644
--- a/src/version.h
+++ b/src/version.h
@@ -28,7 +28,7 @@
 #define APP_ID        "xmr_arh64"
 #define APP_NAME      "xmr_arh64"
 #define APP_DESC      "amr_arh64 CPU miner"
-#define APP_VERSION   "0.0.5"
+#define APP_VERSION   "0.0.6"
 #define APP_DOMAIN    "eplus.systems"
 #define APP_SITE      "xmr.eplus.systems"
 #define APP_COPYRIGHT "Copyright (C) 2017-2018 ePlus Systems Ltd. [www.eplus.systems]"
@@ -36,7 +36,7 @@
 
 #define APP_VER_MAJOR  0
 #define APP_VER_MINOR  0
-#define APP_VER_BUILD  5
+#define APP_VER_BUILD  6
 #define APP_VER_REV    0
 
 #endif /* __VERSION_H__ */