diff --git a/docs/index.en.md b/docs/index.en.md
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+++ b/docs/index.en.md
@@ -56,4 +56,4 @@ The total prize money is over 1 million yen. For details, please refer to the [2
 
 ## Challenges
 
-The racing kart will drive around a circuit course and compete for the time it takes to complete a set number of laps. Although the cars will be driving alone this time, in the future they will be driving together with others. Therefore, there is a challenge to avoid virtual objects placed on the course.
+The racing kart will drive around a circuit course and compete for the time it takes to complete a set number of laps. Although the karts will be driving alone this time, in the future they will be driving together with others. Therefore, there is a challenge to avoid virtual objects placed on the course.