diff --git a/ch11_blockchain.adoc b/ch11_blockchain.adoc
index 521131ce..f352040e 100644
--- a/ch11_blockchain.adoc
+++ b/ch11_blockchain.adoc
@@ -255,7 +255,10 @@ You can search for that block hash in almost any block explorer website, such
 as _blockstream.info_, and you will find a page describing the contents
 of this block, with a URL containing that hash:
 
+[quote]
+----
 https://blockstream.info/block/000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f
+----
 
 Alternatively, you can get the block using Bitcoin Core on the command line: