diff --git a/migrations/initial.ts b/migrations/initial.ts
index 1040564..eb630d9 100644
--- a/migrations/initial.ts
+++ b/migrations/initial.ts
@@ -12,7 +12,7 @@ export async function up(knex:Knex) {
         b.string("content_type",16).notNullable();
         b.string("basepath",256).notNullable().comment("directory path for resource");
         b.string("filename",256).notNullable().comment("filename");
-        b.string("thumbnail").nullable();
+        b.string("content_hash").nullable();
         b.json("additional").nullable();
         b.timestamps();
         b.index("content_type","content_type_index");