diff --git a/concepts/zero-sum-game.md b/concepts/zero-sum-game.md
index 63f9780..575d33c 100644
--- a/concepts/zero-sum-game.md
+++ b/concepts/zero-sum-game.md
@@ -1,7 +1,7 @@
 # Zero Sum Game
 An economic game which involves two sides and where the result is an advantage for one side and a loss for the other. The sum of all gains and losses across all players sums to zero.
 
-Investing in crypto tokens is necessarily a zero sum games before considering the cost of transactions and network maintenance. 
+Investing in crypto tokens is necessarily a zero sum game before considering the cost of transactions and network maintenance. 
 
 ## Negative Sum Games
 An economic game where all gains and losses across all players sums to a negative quantity.