diff --git a/How-to-play.md b/How-to-play.md
index 613acaa..efd34e6 100644
--- a/How-to-play.md
+++ b/How-to-play.md
@@ -1,6 +1,6 @@
 # Preconditions:
 
-- newer version of the Firfox of Chrome browser
+- newer version of the Firefox of Chrome browser
 - keyboard
 - mouse