diff --git a/db/app_uoj233.sql b/db/app_uoj233.sql
index 23a9cf3..870225a 100644
--- a/db/app_uoj233.sql
+++ b/db/app_uoj233.sql
@@ -994,7 +994,8 @@ INSERT INTO `upgrades` (`name`, `status`, `updated_at`) VALUES
   ('20_problem_difficulty', 'up', now()),
   ('21_problem_difficulty', 'up', now()),
   ('28_remote_judge', 'up', now()),
-  ('31_problem_resources', 'up', now());
+  ('31_problem_resources', 'up', now()),
+  ('36_decimal_score_range', 'up', now());
 /*!40000 ALTER TABLE `upgrades` ENABLE KEYS */;
 UNLOCK TABLES;
 
diff --git a/web/app/upgrade/36_decimal_score_range/up.sql b/web/app/upgrade/36_decimal_score_range/up.sql
new file mode 100644
index 0000000..ec0b8f6
--- /dev/null
+++ b/web/app/upgrade/36_decimal_score_range/up.sql
@@ -0,0 +1,4 @@
+ALTER TABLE `contests_submissions` MODIFY `score` DECIMAL(15, 10) NOT NULL;
+ALTER TABLE `submissions` MODIFY `score` DECIMAL(15, 10) DEFAULT NULL;
+ALTER TABLE `submissions` MODIFY `hidden_score` DECIMAL(15, 10) DEFAULT NULL;
+ALTER TABLE `submissions_history` MODIFY `score` DECIMAL(15, 10) DEFAULT NULL;