diff --git a/lesson11.slide b/lesson11.slide
index 2bdcaa4..d80be36 100644
--- a/lesson11.slide
+++ b/lesson11.slide
@@ -45,7 +45,7 @@ https://github.com/RedHatOfficial/GoCourse
 - BSON
 - MessagePack
 
-- https://en.wikipedia.org/wiki/Comparison_of_data-serialization_formats
+- [[https://en.wikipedia.org/wiki/Comparison_of_data-serialization_formats]]