diff --git a/migrations/20210707154724-users-migrate-avatar.js b/migrations/20210707154724-users-migrate-avatar.js
index 38691f08a..f7fc26c21 100644
--- a/migrations/20210707154724-users-migrate-avatar.js
+++ b/migrations/20210707154724-users-migrate-avatar.js
@@ -1,9 +1,13 @@
 'use strict';
 
 exports.up = function(db, callback) {
-    db.all('UPDATE users SET avatar="gravatar" WHERE avatar IS NULL', callback);
+    db.runSql('UPDATE users SET avatar="gravatar" WHERE avatar IS NULL', function (error) {
+        if (error) return callback(error);
+
+        db.runSql('ALTER TABLE users MODIFY avatar MEDIUMBLOB NOT NULL', callback);
+    });
 };
 
 exports.down = function(db, callback) {
-    callback();
+    db.runSql('ALTER TABLE users MODIFY avatar MEDIUMBLOB', callback);
 };
diff --git a/migrations/schema.sql b/migrations/schema.sql
index 928141437..16bece4c3 100644
--- a/migrations/schema.sql
+++ b/migrations/schema.sql
@@ -31,7 +31,7 @@ CREATE TABLE IF NOT EXISTS users(
     resetToken VARCHAR(128) DEFAULT "",
     resetTokenCreationTime TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
     active BOOLEAN DEFAULT 1,
-    avatar MEDIUMBLOB,
+    avatar MEDIUMBLOB NOT NULL,
     locationJson TEXT, // { locations: [{ ip, userAgent, city, country, ts }] }
 
     INDEX creationTime_index (creationTime),