diff --git a/modules/Twitter.py b/modules/Twitter.py
index e752203..a0eaf7c 100644
--- a/modules/Twitter.py
+++ b/modules/Twitter.py
@@ -102,7 +102,7 @@ class Twitter(Module):
                 cur = db.cursor(mdb.cursors.DictCursor)
                 cur.execute("""
                     CREATE TABLE twitter_settings (
-                        since_id SERIAL,
+                        since_id BIGINT(20) UNSIGNED NOT NULL,
                         output_channel VARCHAR(64) NOT NULL,
                         oauth_token VARCHAR(256) DEFAULT NULL,
                         oauth_token_secret VARCHAR(256) DEFAULT NULL