diff --git a/module2/exo4/journal.md b/module2/exo4/journal.md
index d17d0984004ba22fda96914962535f18b6b9ff6f..575dee555d13dac2e131162fa8fe15a853072af1 100644
--- a/module2/exo4/journal.md
+++ b/module2/exo4/journal.md
@@ -48,15 +48,13 @@ println("Hello World")
 
 You can use multiple languages in the same document, as the kernel is choose by the language name, i.e. the code block :
 
-```markdown
- This block will call python interpreter
-​ ```python
- print('ok')
- ```
- This block will call kotlin interpreter
- ```kotlin
- println("Ok")
- ```
-```
+<pre><code class="markdown">
+    ```python
+    print('Ok') # Use python kernel
+    ```
+    ```kotlin
+    println("Ok") // Use kotlin kernel
+    ```
+</code></pre>
 
 You can find an usage example at [usage](example.md) and view the [result in the IDE](example.png)