diff --git a/book/source/01-intro.md b/book/source/01-intro.md
index 50aba63..89a4f3f 100644
--- a/book/source/01-intro.md
+++ b/book/source/01-intro.md
@@ -8,7 +8,8 @@ This text is *not* intended as a guide for end-users of OpenPGP-related software
 
 ## What is OpenPGP?
 
-OpenPGP is an open standard for cryptographic operations. OpenPGP supports the secure delivery of files and messages between a sender and a recipient as well as verification of the sender. OpenPGP is an outgrowth of the ["Pretty Good Privacy (PGP)"](https://en.wikipedia.org/wiki/Pretty_Good_Privacy) encryption program and has many widely used and interoperable implementations.  
+OpenPGP is an open standard for cryptographic operations. OpenPGP supports the secure delivery of files and messages between a sender and a recipient as well as verification of the sender. OpenPGP is an outgrowth of the ["Pretty Good Privacy (PGP)"](https://en.wikipedia.org/wiki/Pretty_Good_Privacy) encryption program and has many widely used and interoperable implementations. 
+ 
 {::comment}
 Heiko, let's be sure to create our own page on interoperability instead of linking to this 
 {:/comment}