diff --git a/lib/db.py b/lib/db.py
index 4fee972..da9c837 100644
--- a/lib/db.py
+++ b/lib/db.py
@@ -161,18 +161,18 @@ class DB:
             "UPDATE scheme SET version=12",
         )
         schemes[13] = (
-            """DROP TABLE IF EXISTS linked_revs""",
-            """
-            CREATE TABLE users (
+            "DROP TABLE IF EXISTS users",
+            """CREATE TABLE users (
                 id              SERIAL PRIMARY KEY,
                 userid          VARCHAR(255) NOT NULL,
                 email           VARCHAR(255) NOT NULL,
                 realname        VARCHAR(255) NOT NULL
-            )
-            """,
+                )
+                """,
             "UPDATE scheme SET version=13",
-        ),
+        )
         schemes[14] = (
+            "DROP TABLE IF EXISTS linked_revs",
             """
             CREATE TABLE linked_revs (
                 id              SERIAL PRIMARY KEY,
@@ -182,11 +182,11 @@ class DB:
             """,
             "UPDATE scheme SET version=14",
         )
-        schemes[14] = (
-            "ALTER TABLE revisions ALTER COLUMN rev TYPE real USING rev::real",
-            "UPDATE scheme SET version=14",
-        )
         schemes[15] = (
+            "ALTER TABLE revisions ALTER COLUMN rev TYPE real USING rev::real",
+            "UPDATE scheme SET version=15",
+        )
+        schemes[16] = (
             """DROP TABLE IF EXISTS fake_revs""",
             """
             CREATE TABLE fake_revs (
@@ -196,16 +196,16 @@ class DB:
             )
             """,
             "create index revs_linked on fake_revs (revision_id,linked_id)",
-            "UPDATE scheme SET version=15",
-        )
-        schemes[16] = (
-            "ALTER TABLE revisions ADD COLUMN files_hash VARCHAR(40)",
             "UPDATE scheme SET version=16",
         )
         schemes[17] = (
-            "ALTER TABLE linked_revs ADD COLUMN considered BOOLEAN DEFAULT FALSE",
+            "ALTER TABLE revisions ADD COLUMN files_hash VARCHAR(40)",
             "UPDATE scheme SET version=17",
         )
+        schemes[18] = (
+            "ALTER TABLE linked_revs ADD COLUMN considered BOOLEAN DEFAULT FALSE",
+            "UPDATE scheme SET version=18",
+        )
         schema_version = self.schema_version()
         if (schema_version + 1) not in schemes:
             return