diff --git a/preface.asciidoc b/preface.asciidoc
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+++ b/preface.asciidoc
@@ -172,7 +172,7 @@ Thank you all for supporting me throughout this journey.
 
 === Acknowledgments by Rene
 
-I want to mainly thank all the students I ever tought and who engaged into interesting discussions and questions. Believe it or not from you I learnt the most. I am also gratefull to the Bitcoin and Lightning Network community who wellcomed me and supported my efforts. In particular I am grateful to all the open source bitcoin and lightning network protocol developers and people who fund them to make that technology possible. Last but not least I am thankfull to my loved ones.
+I want to mainly thank all the students I ever taught and who engaged into interesting discussions and questions. Believe it or not from you I learnt the most. I am also grateful to the Bitcoin and Lightning Network community who welcomed me and supported my efforts. In particular I am grateful to all the open source bitcoin and lightning network protocol developers and people who fund them to make that technology possible. Last but not least I am thankful to my loved ones.
 
 [[github_contrib]]
 === Contributions