diff --git a/4-Classification/2-Classifiers-1/solution/R/lesson_11.Rmd b/4-Classification/2-Classifiers-1/solution/R/lesson_11.Rmd
index 5fb6cf4f..2bc9b998 100644
--- a/4-Classification/2-Classifiers-1/solution/R/lesson_11.Rmd
+++ b/4-Classification/2-Classifiers-1/solution/R/lesson_11.Rmd
@@ -18,7 +18,7 @@ In this lesson, we'll explore a variety of classifiers to *predict a given natio
 
 ### **Preparation**
 
-This lesson builds up on our [previous lesson](https://github.com/microsoft/ML-For-Beginners/blob/main/4-Classification/1-Introduction/solution/R/lesson_10.md) where we:
+This lesson builds up on our [previous lesson](https://github.com/microsoft/ML-For-Beginners/blob/main/4-Classification/1-Introduction/solution/R/lesson_10.html) where we:
 
 -   Made a gentle introduction to classifications using a dataset about all the brilliant cuisines of Asia and India 😋.