diff --git a/ch08.asciidoc b/ch08.asciidoc
index fe543fab..ae2c1ddd 100644
--- a/ch08.asciidoc
+++ b/ch08.asciidoc
@@ -394,7 +394,7 @@ To construct the block header, the mining node needs to fill in six fields, as l
 | 4 bytes | Nonce | A counter used for the Proof-Of-Work algorithm
 |=======
 
-At the time block 277,316 was mined, the version number describing the block structure is version "2," which is encoded in little-endian format in 4 bytes as +0x02000000+. 
+At the time block 277,316 was mined, the version number describing the block structure is version 2, which is encoded in little-endian format in 4 bytes as +0x02000000+. 
 
 Next, the mining node needs to add the "Previous Block Hash." That is the hash of the block header of block 277,315, the previous block received from the network, which Jing's node has accepted and selected as the parent of the candidate block 277,316. The block header hash for block 277,315 is +0000000000000002a7bbd25a417c0374cc55261021e8a9ca74442b01284f0569+.