diff --git a/Web-Browsers.md b/Web-Browsers.md
index b1a357f..908a52a 100644
--- a/Web-Browsers.md
+++ b/Web-Browsers.md
@@ -23,7 +23,9 @@ On both Android and iOS, touching is required to start sound. This is the browse
 
 # Emulate context-lost
 
-`document.getElementsByTagName("canvas")[0].getContext("webgl").getExtension('WEBGL_lose_context').loseContext()
-undefined`
+```
+document.getElementsByTagName("canvas")[0].getContext("webgl").getExtension('WEBGL_lose_context').loseContext()
+undefined
+```
 
 Note that Ebiten automatically restores images when the context is lost.