diff --git a/README.md b/README.md
index e9e0a06..b547026 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@ To install artifacts into your local Maven repository execute: mvn install
 
 To explore the code, we recommend importing the projects (located in the sub-directories) into an IDE such as Eclipse or IntelliJ Idea.
 
-For more information about the book, visit http://manning.com/fisher.
+For more information about the book, visit https://manning.com/fisher.
 
 ## Modules