diff --git a/migrations/16/down.sql b/migrations/16/down.sql
new file mode 100644
index 0000000..2ed1cf8
--- /dev/null
+++ b/migrations/16/down.sql
@@ -0,0 +1,5 @@
+ALTER TABLE threads
+ DROP COLUMN markdown_status;
+
+ALTER TABLE remarks
+ DROP COLUMN markdown_status;
diff --git a/migrations/16/up.sql b/migrations/16/up.sql
new file mode 100644
index 0000000..b2d8d94
--- /dev/null
+++ b/migrations/16/up.sql
@@ -0,0 +1,23 @@
+ALTER TABLE threads
+  ADD COLUMN markdown_status BOOLEAN;
+
+-- Since Markdown was default, set existing threads to true
+UPDATE threads
+   SET markdown_status = TRUE;
+
+-- Now we can make it NOT NULL
+ALTER TABLE threads
+ALTER COLUMN markdown_status
+  SET NOT NULL;
+
+-- Do the same for remarks
+
+ALTER TABLE remarks
+  ADD COLUMN markdown_status BOOLEAN;
+
+UPDATE remarks
+   SET markdown_status = TRUE;
+
+ALTER TABLE remarks
+ALTER COLUMN markdown_status
+  SET NOT NULL;