1 files changed, 1 insertions, 1 deletions

diff --git a/api/src/main/java/market/guess/api/GuessMarketContext.java b/api/src/main/java/market/guess/api/GuessMarketContext.java
index f010e1c..d959de6 100644
--- a/api/src/main/java/market/guess/api/GuessMarketContext.java
+++ b/api/src/main/java/market/guess/api/GuessMarketContext.java
@@ -13,7 +13,7 @@ public interface GuessMarketContext {
 
   EventDetailDTO getEvent(String eventKey);
 
-  PurchaseReceiptDTO buyShares(String userName, String eventKey, String optionKey, long quantity)
+  PurchaseReceiptDTO buyShares(String userName, String eventKey, String optionKey, int quantity)
       throws GuessMarketException;
 
   EventDetailDTO closeEvent(String userName, String eventKey, String winningOptionKey)