diff --git a/css/main.css b/css/main.css
index 747b34a2b6376738130b1e7f5e904f0a24c253a0..920307e43f4b07438a27e423ac16657032148080 100644
--- a/css/main.css
+++ b/css/main.css
@@ -1,3 +1,4 @@
+@charset "UTF-8";
 /**
  * Main styles for reveal.js 
  *