diff --git a/history/block-version.md b/history/block-version.md
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index 0000000..7252bfd
--- /dev/null
+++ b/history/block-version.md
@@ -0,0 +1,7 @@
+| Version Number | Proposed In | Released | Summary |
+|--|--|---|
+|||Aug 2017| Bitcoin Cash hard fork.|
+|4|[BIP-0065](/history/bips)| Nov 2015<br>Bitcoin Core 0.11.2| Added support for `OP_CHECKLOCKTIMEVERIFY` opcode.|
+|3|[BIP-0066](/history/bips)|Jul 2015<br>Bitcoin Core 0.10.0| Added enforcement of DER encoding of all ECDSA signatures in new blocks.|
+|2|[BIP-0034](/history/bips)|Sep 2012<br>Bitcoin Core 0.7.0| Added the block height within the block coinbase.|
+|1||Jan 2009|The format used in the genesis block.|
\ No newline at end of file
diff --git a/protocol/blockchain/block/block-header.md b/protocol/blockchain/block/block-header.md
index 3094095..5b93ab7 100644
--- a/protocol/blockchain/block/block-header.md
+++ b/protocol/blockchain/block/block-header.md
@@ -16,7 +16,7 @@ Since validation of all the transactions in the block can be expensive, the abil
 
 | Field | Length | Format | Description |
 |--|--|--|--|
-| version | 4 bytes | unsigned integer<sup>[(LE)](/protocol/misc/endian/little)</sup> | The block format version. |
+| version | 4 bytes | unsigned integer<sup>[(LE)](/protocol/misc/endian/little)</sup> | The block format version. Currently 0x04000000. <br>For more details refer to the [block version history](/history/block-version).  |
 | previous block hash | 32 bytes | [block hash](/protocol/blockchain/hash)<sup>[(LE)](/protocol/misc/endian/little)</sup> | The hash of the block immediately preceding this block in the blockchain. |
 | merkle root | 32 bytes | [merkle root](/protocol/blockchain/merkle-tree)<sup>[(LE)](/protocol/misc/endian/little)</sup> | The merkle tree root of the transactions in the block. |
 | timestamp | 4 bytes | unix timestamp<sup>[(LE)](/protocol/misc/endian/little)</sup> | The epoch timestamp of the block in seconds. |