diff --git a/Godeps/Godeps.json b/Godeps/Godeps.json
index 199914baa4..16bd387c06 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/gizak/termui",
@@ -51,7 +50,7 @@
 		},
 		{
 			"ImportPath": "github.com/mattn/go-isatty",
-			"Rev": "fdbe02a1b44e75977b2690062b83cf507d70c013"
+			"Rev": "ae0b1f8f8004be68d791a576e3d8e7648ab41449"
 		},
 		{
 			"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 6ca6cc0364..e32b1c5398 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 d23c4e2474..82cd655c41 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/isatty_bsd.go b/Godeps/_workspace/src/github.com/mattn/go-isatty/isatty_bsd.go
index 0352747512..e6282b529a 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