diff --git a/db/sqlite.py b/db/sqlite.py
index 0d72f44..e8d9abc 100644
--- a/db/sqlite.py
+++ b/db/sqlite.py
@@ -35,24 +35,49 @@ class DB:
             (forum_id,)
         ).fetchone()
 
-    def get_threads(self, forum_id, offset, limit):
+    def get_threads(self, forum_id, offset, limit, user_id):
         return self._db().execute('''
-            select t.thread_id, title, t.create_time, t.update_time, t.author_id, name, count(c.thread_id)
-            from threads t, users
-            left join comments c on t.thread_id = c.thread_id
-            where forum_id = ? and user_id = t.author_id
+            select
+              t.thread_id,
+              title,
+              t.create_time,
+              t.update_time,
+              t.author_id,
+              name,
+              count(c.thread_id),
+              t.hidden
+            from
+              threads t,
+              users
+            left join
+              comments c
+            on
+              t.thread_id = c.thread_id
+            where forum_id = ?
+              and user_id = t.author_id
+              and (
+                t.hidden = 0 or (
+                  select 1 from users
+                  where user_id = ?
+                    and (
+                      user_id = t.author_id
+                      -- 1 = moderator, 2 = admin
+                      or role in (1, 2)
+                    )
+                )
+              )
             group by t.thread_id
             order by t.update_time desc
             limit ?
             offset ?
             ''',
-            (forum_id, limit, offset)
+            (forum_id, user_id, limit, offset)
         )
 
     def get_thread(self, thread):
         db = self._db()
-        title, text, author, author_id, create_time, modify_time = db.execute('''
-            select title, text, name, author_id, create_time, modify_time
+        title, text, author, author_id, create_time, modify_time, hidden = db.execute('''
+            select title, text, name, author_id, create_time, modify_time, hidden
             from threads, users
             where thread_id = ? and author_id = user_id
             ''',
@@ -67,7 +92,7 @@ class DB:
             ''',
             (thread,)
         )
-        return title, text, author, author_id, create_time, modify_time, comments
+        return title, text, author, author_id, create_time, modify_time, comments, hidden
 
     def get_thread_title(self, thread_id):
         return self._db().execute('''
@@ -475,6 +500,15 @@ class DB:
             (role, user_id)
         )
 
+    def set_thread_hidden(self, thread_id, hide):
+        return self.change_one('''
+            update threads
+            set hidden = ?
+            where thread_id = ?
+            ''',
+            (hide, thread_id)
+        )
+
     def change_one(self, query, values):
         db = self._db()
         c = db.cursor()
diff --git a/main.py b/main.py
index 97ac77d..07a3651 100644
--- a/main.py
+++ b/main.py
@@ -1,4 +1,4 @@
-VERSION = 'agreper-v0.1'
+VERSION = 'agreper-v0.1.1'
 # TODO put in config table
 THREADS_PER_PAGE = 50
 
@@ -42,7 +42,8 @@ def index():
 def forum(forum_id):
     title, description = db.get_forum(forum_id)
     offset = int(request.args.get('p', 0))
-    threads = [*db.get_threads(forum_id, offset, THREADS_PER_PAGE + 1)]
+    user_id = session.get('user_id', -1)
+    threads = [*db.get_threads(forum_id, offset, THREADS_PER_PAGE + 1, user_id)]
     if len(threads) == THREADS_PER_PAGE + 1:
         threads.pop()
         next_page = offset + THREADS_PER_PAGE
@@ -63,7 +64,7 @@ def forum(forum_id):
 @app.route('/thread/<int:thread_id>/')
 def thread(thread_id):
     user_id = session.get('user_id')
-    title, text, author, author_id, create_time, modify_time, comments = db.get_thread(thread_id)
+    title, text, author, author_id, create_time, modify_time, comments, hidden = db.get_thread(thread_id)
     comments = create_comment_tree(comments)
     return render_template(
         'thread.html',
@@ -74,6 +75,7 @@ def thread(thread_id):
         author = author,
         author_id = author_id,
         thread_id = thread_id,
+        hidden = hidden,
         create_time = create_time,
         modify_time = modify_time,
         comments = comments,
@@ -574,6 +576,25 @@ def admin_restart():
     restart()
     return redirect(url_for('admin'))
 
+@app.route('/thread/<int:thread_id>/hide/', methods = ['POST'])
+def set_hide_thread(thread_id):
+    chk, user = _moderator_check()
+    if not chk:
+        return user
+
+    try:
+        print(request.form['hide'])
+        hide = request.form['hide'] != '0'
+        hide_str = 'Hidden' if hide else 'Unhidden'
+        if db.set_thread_hidden(thread_id, hide):
+            flash(f'{hide_str} thread', 'success')
+        else:
+            flash(f'Failed to {hide_str.lower()} thread', 'error')
+    except Exception as e:
+        flash(str(e), 'error')
+
+    return redirect(request.form['redirect'])
+
 # TODO can probably be a static-esque page, maybe?
 @app.route('/help/')
 def help():
diff --git a/templates/forum.html b/templates/forum.html
index 7c4350f..ac7c1f4 100644
--- a/templates/forum.html
+++ b/templates/forum.html
@@ -1,4 +1,5 @@
 {% extends 'base.html' %}
+{%- from 'moderator.html' import moderate_thread with context %}
 
 {%- macro nav() -%}
 <p style=text-align:center>
@@ -19,14 +20,22 @@
 		<th>Created</th>
 		<th>Updated</th>
 		<th>Comments</th>
+		{%- if user is not none and user.is_moderator() -%}
+		<th>Action</th>
+		{%- endif -%}
 	</tr>
-	{% for id, title, ctime, utime, author_id, author, comment_count in threads %}
+	{% for id, title, ctime, utime, author_id, author, comment_count, hidden in threads %}
 	<tr>
-		<th><a href="{{ url_for('thread', thread_id = id) }}">{{ title }}</a></th>
+		<th>{{ '[hidden] ' if hidden else '' }}<a href="{{ url_for('thread', thread_id = id) }}">{{ title }}</a></th>
 		<td><a href="{{ url_for('user_info', user_id = author_id) }}">{{ author }}</a></td>
 		<td>{{ format_since(ctime) }}</td>
 		<td>{{ format_since(utime) }}</td>
 		<td>{{ comment_count }}</td>
+		<td>
+		{%- if user is not none and user.is_moderator() %}
+		{{- moderate_thread(id, hidden) }}
+		{%- endif -%}
+		</td>
 	</tr>
 	{%- endfor -%}
 </table>
diff --git a/templates/moderator.html b/templates/moderator.html
new file mode 100644
index 0000000..dd9ab2d
--- /dev/null
+++ b/templates/moderator.html
@@ -0,0 +1,7 @@
+{% macro moderate_thread(id, hidden) %}
+<form method=post action="{{ url_for('set_hide_thread', thread_id = id) }}">
+<input name=redirect value="{{ request.full_path }}" hidden>
+<input name=hide value={{ 0 if hidden else 1 }} hidden>
+<input type=submit value="{{ 'Unhide' if hidden else 'Hide' }}">
+</form>
+{% endmacro %}
diff --git a/templates/thread.html b/templates/thread.html
index 80a6c62..049a636 100644
--- a/templates/thread.html
+++ b/templates/thread.html
@@ -1,8 +1,12 @@
 {%- extends 'base.html' %}
 {%- from 'comment.html' import render_comment, reply, thread_author with context %}
+{%- from 'moderator.html' import moderate_thread with context %}
 
 {%- block content %}
-{{ thread_author(author_id, author, create_time, modify_time) }}
+{%- if user is not none and user.is_moderator() -%}
+<p>{{ moderate_thread(thread_id, hidden) }}</p>
+{%- endif -%}
+{{- thread_author(author_id, author, create_time, modify_time) }}
 <p>{{ minimd(text) | safe }}</p>
 
 {{- reply() }}
diff --git a/upgrade/sqlite/v0.1.sh b/upgrade/sqlite/v0.1.sh
new file mode 100644
index 0000000..8c1b7f0
--- /dev/null
+++ b/upgrade/sqlite/v0.1.sh
@@ -0,0 +1,9 @@
+set -ex
+test $# == 1
+"$SQLITE" "$1" "
+begin exclusive;
+	alter table threads rename dead to hidden;
+	alter table comments rename dead to hidden;
+	update config set version = 'agreper-v0.1.1';
+end;
+"
diff --git a/upgrade_sqlite.sh b/upgrade_sqlite.sh
new file mode 100755
index 0000000..c845868
--- /dev/null
+++ b/upgrade_sqlite.sh
@@ -0,0 +1,82 @@
+#!/usr/bin/env bash
+
+# Script to upgrade a database from one version to another by adding columns,
+# tables etc.
+
+LAST_VERSION=agreper-v0.1.1
+
+SQLITE=sqlite3
+
+export SQLITE
+
+set -e
+
+if [ $# -lt 1 ]
+then
+	echo "Usage: $0 <file.db> [--no-backup]" >&2
+	exit 1
+fi
+
+make_backup=0
+
+if [ $# -ge 2 ]
+then
+	case "$2" in
+		--no-backup)
+			make_backup=1
+			;;
+		*)
+			echo "Unknown option $2"
+			exit 1
+			;;
+	esac
+fi
+
+if ! [ -f "$1" ]
+then
+	echo "Database '$1' doesn't exist" >&2
+	exit 1
+fi
+
+version=$(sqlite3 "$1" 'select version from config')
+
+while true
+do
+	case "$version" in 
+		# Last version, do nothing
+		agreper-v0.1.1)
+			echo "$version is the latest version"
+			exit 0
+			;;
+		# Try to upgrade
+		agreper-*)
+			echo "Upgrading from $version"
+
+			if [ $make_backup ]
+			then
+				backup="$1.bak-$version"
+				if [ -f "$backup" ]
+				then
+					echo "Backup '$backup' already exists (did a previous upgrade fail?)" >&2
+					exit 1
+				fi
+				echo "Creating backup of $1 at $backup"
+				cp --reflink=auto "$1" "$backup"
+				make_backup=1
+			fi
+
+			script="./upgrade/sqlite/${version#agreper-}.sh"
+			if ! bash "$script" "$1"
+			then
+				echo "Error while executing $script"
+				exit 1
+			fi
+			;;
+		# Unrecognized version
+		*)
+			echo "Unknown version $version" >&2
+			exit 1
+			;;
+	esac
+	version=$(sqlite3 "$1" 'select version from config')
+done