diff --git a/apiserver/migrations/000003_create_raw_blocks_table.up.sql b/apiserver/migrations/000003_create_raw_blocks_table.up.sql
index efb5d3258..a709c0e84 100644
--- a/apiserver/migrations/000003_create_raw_blocks_table.up.sql
+++ b/apiserver/migrations/000003_create_raw_blocks_table.up.sql
@@ -1,7 +1,7 @@
 CREATE TABLE `raw_blocks`
 (
     `block_id`   BIGINT UNSIGNED NOT NULL,
-    `block_data` BLOB            NOT NULL,
+    `block_data` MEDIUMBLOB      NOT NULL,
     PRIMARY KEY (`block_id`),
     CONSTRAINT `fk_raw_blocks_block_id`
         FOREIGN KEY (`block_id`)