diff --git a/Godeps/Godeps.json b/Godeps/Godeps.json
index d5c41227dc35ab68b2f48466d450eb4705a614fc..c939ae67074dd89a38a56582064a188efcd2e1b3 100644
--- a/Godeps/Godeps.json
+++ b/Godeps/Godeps.json
@@ -21,8 +21,7 @@
 		},
 		{
 			"ImportPath": "github.com/ethereum/ethash",
-			"Comment": "v23.1-227-g8f6ccaa",
-			"Rev": "8f6ccaaef9b418553807a73a95cb5f49cd3ea39f"
+			"Rev": "227ec953eae56f4f6c7f5e7dc93b4bbebf0cda2e"
 		},
 		{
 			"ImportPath": "github.com/fatih/color",
@@ -51,7 +50,7 @@
 		},
 		{
 			"ImportPath": "github.com/mattn/go-isatty",
-			"Rev": "fdbe02a1b44e75977b2690062b83cf507d70c013"
+			"Rev": "7fcbc72f853b92b5720db4a6b8482be612daef24"
 		},
 		{
 			"ImportPath": "github.com/mattn/go-runewidth",
diff --git a/Godeps/_workspace/src/github.com/ethereum/ethash/setup.py b/Godeps/_workspace/src/github.com/ethereum/ethash/setup.py
old mode 100644
new mode 100755
diff --git a/Godeps/_workspace/src/github.com/ethereum/ethash/src/libethash/endian.h b/Godeps/_workspace/src/github.com/ethereum/ethash/src/libethash/endian.h
index 6ca6cc036494d4683595a15338a6358b32d988c6..e32b1c539853a7228ac7ae9a8fe09a8976b8ed7f 100644
--- a/Godeps/_workspace/src/github.com/ethereum/ethash/src/libethash/endian.h
+++ b/Godeps/_workspace/src/github.com/ethereum/ethash/src/libethash/endian.h
@@ -35,6 +35,10 @@
 #elif defined(__FreeBSD__) || defined(__DragonFly__) || defined(__NetBSD__)
 #define ethash_swap_u32(input_) bswap32(input_)
 #define ethash_swap_u64(input_) bswap64(input_)
+#elif defined(__OpenBSD__)
+#include <endian.h>
+#define ethash_swap_u32(input_) swap32(input_)
+#define ethash_swap_u64(input_) swap64(input_)
 #else // posix
 #include <byteswap.h>
 #define ethash_swap_u32(input_) __bswap_32(input_)
diff --git a/Godeps/_workspace/src/github.com/ethereum/ethash/src/libethash/fnv.h b/Godeps/_workspace/src/github.com/ethereum/ethash/src/libethash/fnv.h
index d23c4e24740505bd4173ca6293591f1540889806..82cd655c41c91dc3679ea4a34d66d539146241b8 100644
--- a/Godeps/_workspace/src/github.com/ethereum/ethash/src/libethash/fnv.h
+++ b/Godeps/_workspace/src/github.com/ethereum/ethash/src/libethash/fnv.h
@@ -29,6 +29,10 @@ extern "C" {
 
 #define FNV_PRIME 0x01000193
 
+/* The FNV-1 spec multiplies the prime with the input one byte (octet) in turn.
+   We instead multiply it with the full 32-bit input.
+   This gives a different result compared to a canonical FNV-1 implementation.
+*/
 static inline uint32_t fnv_hash(uint32_t const x, uint32_t const y)
 {
 	return x * FNV_PRIME ^ y;
diff --git a/Godeps/_workspace/src/github.com/ethereum/ethash/test/c/test.sh b/Godeps/_workspace/src/github.com/ethereum/ethash/test/c/test.sh
old mode 100644
new mode 100755
diff --git a/Godeps/_workspace/src/github.com/ethereum/ethash/test/python/test.sh b/Godeps/_workspace/src/github.com/ethereum/ethash/test/python/test.sh
old mode 100644
new mode 100755
diff --git a/Godeps/_workspace/src/github.com/ethereum/ethash/test/test.sh b/Godeps/_workspace/src/github.com/ethereum/ethash/test/test.sh
old mode 100644
new mode 100755
diff --git a/Godeps/_workspace/src/github.com/mattn/go-isatty/LICENSE b/Godeps/_workspace/src/github.com/mattn/go-isatty/LICENSE
new file mode 100644
index 0000000000000000000000000000000000000000..65dc692b6b171e95c7e7698674ebaf8524dcd0d6
--- /dev/null
+++ b/Godeps/_workspace/src/github.com/mattn/go-isatty/LICENSE
@@ -0,0 +1,9 @@
+Copyright (c) Yasuhiro MATSUMOTO <mattn.jp@gmail.com>
+
+MIT License (Expat)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/Godeps/_workspace/src/github.com/mattn/go-isatty/isatty_bsd.go b/Godeps/_workspace/src/github.com/mattn/go-isatty/isatty_bsd.go
index 03527475125027e9f3bce0857e19b99fd4f62ffa..e6282b529a2db59e14f052747f2515991a19085a 100644
--- a/Godeps/_workspace/src/github.com/mattn/go-isatty/isatty_bsd.go
+++ b/Godeps/_workspace/src/github.com/mattn/go-isatty/isatty_bsd.go
@@ -1,4 +1,4 @@
-// +build darwin freebsd
+// +build darwin freebsd openbsd netbsd
 
 package isatty