diff --git a/src/base/net/stratum/Job.h b/src/base/net/stratum/Job.h
index 0bd30f5..ea52be7 100644
--- a/src/base/net/stratum/Job.h
+++ b/src/base/net/stratum/Job.h
@@ -45,7 +45,9 @@ class Job
 public:
     // Max blob size is 84 (75 fixed + 9 variable), aligned to 96. https://github.com/xmrig/xmrig/issues/1 Thanks fireice-uk.
     // SECOR increase requirements for blob size: https://github.com/xmrig/xmrig/issues/913
-    static constexpr const size_t kMaxBlobSize = 128;
+    // Haven (XHV) offshore increases requirements by adding pricing_record struct (192 bytes) to block_header.
+    // Round it up to 408 (136*3) for a convenient keccak calculation in OpenCL
+    static constexpr const size_t kMaxBlobSize = 408;
     static constexpr const size_t kMaxSeedSize = 32;
 
     Job() = default;
diff --git a/src/version.h b/src/version.h
index 5afb7e5..43e598c 100644
--- a/src/version.h
+++ b/src/version.h
@@ -28,14 +28,14 @@
 #define APP_ID        "xmrig-proxy"
 #define APP_NAME      "xmrig-proxy"
 #define APP_DESC      "XMRig Stratum proxy"
-#define APP_VERSION   "6.2.0"
+#define APP_VERSION   "6.3.0-dev"
 #define APP_DOMAIN    "xmrig.com"
 #define APP_SITE      "www.xmrig.com"
 #define APP_COPYRIGHT "Copyright (C) 2016-2020 xmrig.com"
 #define APP_KIND      "proxy"
 
 #define APP_VER_MAJOR  6
-#define APP_VER_MINOR  2
+#define APP_VER_MINOR  3
 #define APP_VER_PATCH  0
 
 #ifdef _MSC_VER