diff --git a/ch04.asciidoc b/ch04.asciidoc
index 19b1439..1a1dd19 100644
--- a/ch04.asciidoc
+++ b/ch04.asciidoc
@@ -6,7 +6,7 @@ All communication takes place over a secure, encrypted and authenticated connect
 
 [NOTE]
 ====
-While the specification of how to set up such a connection is part of the lightnig network protocol and can be read upon in BOLT08 we will omit this in the book.
+While the specification of how to set up such a connection is part of the lightning network protocol and can be read upon in BOLT08 we will omit this in the book.
 The reason is that BOLT08 mainly follows the handshake patterns from the noise protocol framework which is a standard template system for secure cryptographic handshakes.
 This protocol framework is also used by Whatsapp and Wireguard and is very well documented.
 If you want to learn more we suggest you check out http://www.noiseprotocol.org/