diff --git a/scheme.sql b/scheme.sql
index 269ed8c..9c8cff9 100644
--- a/scheme.sql
+++ b/scheme.sql
@@ -37,7 +37,7 @@ CREATE TABLE `users` (
 
 CREATE TABLE `pictures` (
   `user_id` CHAR(36) NOT NULL,
-  `picture_id` int(11) NOT NULL,
+  `picture_id` CHAR(36) NOT NULL,
   `likes` int(11) DEFAULT 0,
   `location` varchar(20) NOT NULL,
   `description` varchar(250) DEFAULT NULL,